Update translations
Update French translation
Update Polish translation
Merge pull request #293 from zetok/translation

Update Polish translation
Italian translation: update
Merge pull request #296 from Ansa89/italian-translation

Italian translation: update
fix: Force video output to follow aspect ratio #130
Merge pull request #297 from apprb/master

fix: Force video output to follow aspect ratio #130
bug fix in ChatAreaWidget: absolute coordinates should be used to detect clicks on a FileTransferInstance's buttons
Merge pull request #299 from apprb/dev

bug fix in ChatAreaWidget