Merge branch 'pr788'
Update makedist.sh
Create postinstall
Create preinstall
Merge branch 'pr789'
fix #775
Merge branch 'pr790'
use GlobalAutoAcceptDir only if autosaving enabled
Merge branch 'pr792'
The showSystemTrayIcon's default value is false for linux else it is false.
Cherry pick pull request #793

Closes #793
Update de.ts

Added some translations.
Merge branch 'pr794'
Vol button: Less blury, use Tox Red when pressed

Helps with #554 and #795
Update Ukrainian translation
Mic button: Less blury, use Tox Red when pressed

Helps with #554 and #795
Call buttons: Use tox red
Merge branch 'pr796'
Widget: Don't delete icon, it's a child
Put group chats audio playing in its own thread