Updates since draft #3
- OXUD-1006 Update the function description in the settings menu for all Apps
- OXUD-1005 Remove the Topic 'Kalender von Interesse abonnieren' from the Docu
- Tiny terminology polishing.
- OXUD-1003 Update: mention 'distribution lists' in both address book pickers
- OXUD-1001 Updates for marking e-mails & some DocBook code cleanup

- OXUD-999 Add a topic about printing files via the viewer
- OXUD-1000 Enhancement: unify the wording for choosing an menu item

- Various fixes and content updates
- Removed Chat topics
- svg icon added

- OXUD-973 Bugfix for OXUIB-1040 Cosmetic changes needed in the help section
- OXUD-938 Topics to check regarding UI redesign
- OXUD-972 Update the description of the folder tree behavior
- OXUD-954 Update the docu regarding UI redesign in Drive and in other Apps
- OXUD-947 Update all search topics regarding the UI redesign
- Terminology update