Update Polish translation
Italian translation: update

Sync'ed with 8943303fce6589c031b6918cda137a0d3980644a
Fix null pointer exception and remove friend ordering on new message
Removing unsued functions
Closing all the databases in AntoxDB.
Not allowing duplicate keys to be in the list of friends keys.
Solve conflicts resulted from merge. Upstream had priority.
Remove unused imports.
Fix null pointer exception in settings activity on update
Merge branch 'Corly-master'
Merge branch 'zetok-translation'
Merge branch 'Ansa89-patch-1'
Register on typing change callback
Update Polish translation
Italian translation: update

Sync'ed with 2e9f54b898ad757f98a40b627ab41eb7e2f7c3bb
Create a proper database upgrade method rather than dropping all tables.
Merge remote-tracking branch 'upstream/master'
Add comments regarding updating the database.
Fix order of columns
Merge branch 'Corly-master'