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