Steps to reproduce:
Problem with both android and IOS

1. compose new e-mail
2. tap the small plus above the text field
3. tap one of the given options e.g.:"Bild" (= Image)

Actual results:
The window to choose the object is cut off on the right side so that there is no button visible with which you can choose a file from your mobile phone (like in the desktop version). The window cannot be moved either.

Expected result:
The window should adjust to the screen size.