add localized strings
Update Ukrainian translation
Setting forms: similar outlook and inner structure
multiple file sending race condition fix
Update french translation
Merge branch 'pr559'
Merge branch 'pr560'
Merge branch 'pr561'
Merge branch 'pr565'
Merge branch 'pr566'
Update Polish translation
Merge branch 'pr568'
Index cylgom and krepa smiley packs in repo
Embed cylgom and krepa emoticon packs

Thanks to @cylgom and @krepa098

Closes #555, fixes #304
more strings for translation
Merge branch 'pr569'
Better preview of cylgom emoticons
prevent duplicating emoticons on the list
network setting unification s/disable/enable/ UDP
Merge branch 'pr574'