diff --git a/plugins/libkolab/skins/elastic/include/kolab_files.less b/plugins/libkolab/skins/elastic/include/kolab_files.less
index 7231aad9..f71430f1 100644
--- a/plugins/libkolab/skins/elastic/include/kolab_files.less
+++ b/plugins/libkolab/skins/elastic/include/kolab_files.less
@@ -1,523 +1,524 @@
 /**
  * Kolab core library
  *
  * This file contains Elastic skin styles for kolab_files plugin.
  *
  * @author Aleksander Machniak <machniak@kolabsys.com>
  *
  * Copyright (C) 2012-2018, Kolab Systems AG <contact@kolabsys.com>
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Affero General Public License as
  * published by the Free Software Foundation, either version 3 of the
  * License, or (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  * GNU Affero General Public License for more details.
  *
  * You should have received a copy of the GNU Affero General Public License
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
 a.btn.fromcloud:before,
 li > a.icon.saveas:before,
 a.button.filesaveall:before,
 a.button.saveas:before {
     &:extend(.font-icon-class);
     content: @fa-var-folder;
 }
 
 .menu {
     a.mount.storage:before {
         content: @fa-var-database;
     }
 
     a.open:before {
         content: @fa-var-eye;
     }
 
     a.rename:before {
         content: @fa-var-pen-square;
     }
 
     a.cancel:before {
         content: @fa-var-times;
     }
 
     a.share:before {
         content: @fa-var-share-alt;
     }
 }
 
 .ui-dialog .ui-dialog-buttonpane .ui-dialog-buttonset a.btn-link.options.add-folder {
     order: -1;
 
     &:before {
         content: @fa-var-plus;
     }
 }
 
 .folderlist {
     li.collection {
         a.name {
             padding-left: .5em;
         }
 
         &.audio a.name:before {
             .font-icon-solid(@fa-var-volume-up);
         }
 
         &.video a.name:before {
             .font-icon-solid(@fa-var-video);
         }
 
         &.image a.name:before {
             content: @fa-var-image;
         }
 
         &.document a.name:before {
             .font-icon-solid(@fa-var-book);
         }
 
         &.sessions a.name:before {
             .font-icon-solid(@fa-var-users);
         }
     }
 
     li.mailbox {
         a.subscription {
             cursor: pointer;
             // reset listing's link style
             padding: 0 !important;
             border-left: 0;
             width: auto;
 
             &:before {
                 .font-icon-regular(@fa-var-bookmark); // TODO: better icon
                 height: auto;
                 color: @color-link;
                 margin-right: .25rem;
             }
 
             &.subscribed:before {
                 &:extend(.font-icon-class);
                 .font-icon-solid(@fa-var-bookmark); // TODO: better icon
             }
         }
     }
 }
 
 #filelistcontainer {
     position: relative;
 }
 
 #filelistbox {
     height: 100%;
 
     &.droptarget {
         &.active {
             box-shadow: 0 0 2px 1px darken(@color-toolbar-button-background-hover, 20%) inset;
         }
 
         &.hover {
             box-shadow: 0 0 2px 1px darken(@color-toolbar-button-background-hover, 20%) inset;
             background-color: @color-toolbar-button-background-hover;
         }
     }
 }
 
 .filelist {
     thead {
         display: none;
     }
 
     td.options {
         display: none;
     }
 
     td.name {
         position: relative;
     }
 
     td.mtime {
         width: 11em;
     }
 
     td.size {
         text-align: right;
         width: 6em;
     }
 
     tr.session > td.name {
         padding-right: 2em;
 
         &:after {
             &:extend(.font-icon-class);
             content: @fa-var-users;
             color: @color-black-shade-border;
             position: absolute;
             right: .25em;
             top: 0;
         }
     }
 
     tr.session.invited > td.name:after {
         color: @color-success;
     }
 
     tr.session.owner > td.name:after {
         color: @color-black;
     }
 }
 
 @media screen and (max-width: @screen-width-xs) {
     .filelist {
         td.mtime {
             display: none;
         }
     }
 }
 
 .filelist tbody td.filename {
     & span {
         background: transparent !important;
     }
 
     & span:before {
         &:extend(.font-icon-class);
         .font-icon-regular(@fa-var-file);
     }
 
     &.pdf span:before,
     &.application_pdf span:before {
         content: @fa-var-file-pdf;
     }
 
     &.application_vnd_openxmlformats_officedocument_wordprocessingml_document span:before,
     &.application_vnd_openxmlformats_officedocument_wordprocessingml_template span:before,
     &.application_vnd_ms_word span:before,
     &.application_msword span:before {
         content: @fa-var-file-word;
     }
 
     &.application_vnd_ms_excel span:before,
     &.application_vnd_openxmlformats_officedocument_spreadsheetml_sheet span:before,
     &.application_vnd_openxmlformats_officedocument_spreadsheetml_template span:before,
     &.application_vnd_oasis_opendocument_spreadsheet span:before,
     &.application_vnd_oasis_opendocument_spreadsheet_template span:before {
         content: @fa-var-file-excel;
     }
 
     &.application_vnd_openxmlformats_officedocument_presentationml_presentation span:before,
     &.application_vnd_openxmlformats_officedocument_presentationml_template span:before,
     &.application_vnd_openxmlformats_officedocument_presentationml_slideshow span:before,
     &.application_vnd_ms_powerpoint span:before {
         content: @fa-var-file-powerpoint;
     }
 
     &.application_vnd_oasis_opendocument_text span:before {
         content: @fa-var-file-alt; // TODO
     }
 
     &.application_vnd_oasis_opendocument_presentation span:before,
     &.application_vnd_oasis_opendocument_presentation_template span:before {
         content: @fa-var-file-powerpoint; // TODO
     }
 
     &.tar span:before,
     &.application_zip span:before,
     &.application_x_7z_compressed span:before,
     &.application_x_ace span:before,
     &.application_x_arc span:before,
     &.application_x_arj span:before,
     &.application_x_bzip_compressed_tar span:before,
     &.application_x_lha span:before,
     &.application_x_rar span:before,
     &.application_x_tarz span:before,
     &.application_x_tzo span:before,
     &.application_x_zip span:before,
     &.application_x_zoo span:before {
         content: @fa-var-file-archive;
     }
 
     &.image span:before,
     &.image_png span:before,
     &.image_svg_xml span:before,
     &.image_jpeg span:before,
     &.image_jpeg2000 span:before,
     &.image_x_eps span:before,
     &.application_vnd_stardivision_draw span:before,
     &.application_vnd_sun_xml_draw span:before,
     &.application_vnd_sun_xml_draw_template span:before {
         content: @fa-var-file-image;
     }
 
     &.application_pgp_keys span:before,
     &.application_pkcs7_mime span:before {
         // TODO
     }
 
     &.audio span:before {
         content: @fa-var-file-audio;
     }
 
     &.video span:before {
         content: @fa-var-file-video;
     }
 
     &.ascii span:before,
     &.text_plain span:before {
         content: @fa-var-file-alt;
     }
 
     &.vcalendar span:before {
         // TODO
     }
 
     &.vcard span:before,
     &.text_x_vcard span:before {
         // TODO
     }
 
     &.text_html span:before {
         content: @fa-var-file-code;
     }
 
     &.style_css span:before {
         // TODO
     }
 
     &.text_csv span:before {
         // TODO
     }
 
     &.message_rfc822 span:before {
         // TODO
     }
 }
 
 #folder-mount-form {
     td.source {
         display: flex;
         align-items: flex-start;
         padding: .5rem;
 
         &.selected {
             background-color: @color-list-selected-background;
         }
 
         & > input {
             height: 32px;
             margin-right: .5rem;
         }
 
         & > div {
             flex: 1;
         }
 
         img {
             height: 32px;
             margin-right: .5rem;
         }
 
         .name {
             font-weight: bold;
         }
 
         .description {
             font-size: 90%;
         }
 
         table {
             margin-top: .5rem;
         }
 
         .form-group {
             margin-bottom: 0;
         }
     }
 
     .auth-options {
         margin-top: .5rem;
 
         & > label:before {
             line-height: 1;
         }
     }
 }
 
 .files-dialog {
     .selection-list {
         flex: 1;
         min-width: 220px;
     }
 
     .selection-content {
         flex: 2;
 
         @media screen and (min-width: (@screen-width-small + 1px)) {
             border: 1px solid @color-layout-border;
             border-left: 0;
         }
     }
 
     a.subscription {
         display: none;
     }
 
     @media screen and (max-width: @screen-width-small) {
         .selection-list {
             display: none;
         }
     }
 }
 
 .document-editor-header {
     .toolbar {
         text-align: left !important;
-    }
+        flex: 1;
 
-    .header-title {
-        margin: 0 !important;
+        a {
+            text-align: center;
+        }
     }
 
     a.button.icon.members:before {
         content: @fa-var-users;
     }
 
     #collaborators {
         order: 9;
         display: flex;
         margin-right: .5rem;
         margin-left: 2rem;
 
         a.button.add:before {
             &:extend(.font-icon-class);
             content: @fa-var-plus;
         }
 
         .inner {
             display: none;
         }
     }
 
     #doc-title {
         flex: 1;
         order: 8;
 
         input {
             display: inline;
         }
     }
 }
 
 .session-members {
     img.photo {
         width: 48px;
         height: 48px;
         min-width: 48px;
         overflow: hidden;
         background: url("@{skin-path}/images/contactpic.png") center center no-repeat #fff;
         background-size: cover;
         border-radius: 50%;
         border: solid 3px #eee;
         margin-left: .5rem;
     }
 
     ul {
         padding: 0;
         margin: 0;
         list-style-type: none;
 
         li {
             display: flex;
             align-items: center;
         }
 
         img.photo {
             margin-left: 0;
             margin-right: 1em;
         }
     }
 }
 
 .editors-dialog {
     table {
         th {
             border: 0;
         }
 
         tr:last-child td {
             border-bottom: 1px solid @color-layout-border;
         }
 
         td.options {
             width: 1%;
 
             a.delete:before {
                 &:extend(.font-icon-class);
                 content: @fa-var-trash-alt;
                 display: inline;
                 line-height: 1;
             }
         }
     }
 
     label {
         display: block;
     }
 }
 
 button.participant.add:before {
     content: @fa-var-user-plus;
 }
 
 .iframe-wrapper.file-type-audio,
 .iframe-wrapper.file-type-video {
     display: flex;
     align-items: center;
     justify-content: center;
 
     @media screen and (min-width: (@screen-width-small + 1px)) {
         padding: 1em;
     }
 }
 
 #shareform {
     table {
         td,th {
             padding-left: .15rem;
             max-width: 10vw; // needed for overflow
             .overflow-ellipsis;
 
             &:last-child {
                 padding-right: .15rem;
                 width: 1%;
                 max-width: unset;
             }
         }
 
         td {
             vertical-align: middle;
 
             &.form {
                 input {
                     margin-bottom: .25rem;
                     width: 100%;
                 }
             }
         }
 
         tr + tr > td {
             border-top: 0;
             padding-bottom: .25rem;
         }
 
         button {
             padding: .185rem .75rem;
             width: 100%;
         }
     }
 }