Small update for the dutch translation

Forgot to remove a comment
Italian translation: update
Merge pull request #422 from Ansa89/italian-translation

Italian translation: update
Update German translation
Merge pull request #424 from sfan5/master

Update German translation
Merge pull request #420 from Impyy/dutch-update

Small update for the dutch translation
Fix missing header definitions for typing notifications
Merge pull request #425 from albel727/fix-missing-defs

Fix missing header definitions for typing notifications