Merge remote-tracking branch 'origin/devel' into feature/6342-update-camouflage-for-gnome3
merge
Merge branch 'master' of https://git-tails.immerda.ch/tails
Merge branch 'master' of https://git-tails.immerda.ch/tails
merge
merge
Rename "Audio" and "Sound and video"

That matches the structure of the Applications menu and allows for inclusion of
more applications.
Rename files to match page name
Keep legacy tickets URLs separated from the rest
Add intro phrase
Add menu path
Format as bullet list
Fix URL
List missing applications
Draft more description of applications
Fix applications names as from upstream
Add Traverso to Features page
Merge Desktop publishing into Graphics

Both pages are pretty small and refer to applications in the Graphics menu.
Add intro
Rewrite menu path