T1373: Fix untraslated "PENDING" label in invitation notification
Summary:
Fixes T1373
Note: This could be also fixed by using "NEEDS-ACTION" label in wallace intead of "PENDING".
Reviewers: PyKolab Developers, vanmeeuwen
Reviewed By: PyKolab Developers, vanmeeuwen
Maniphest Tasks: T1373
Differential Revision: https://git.kolab.org/D198