Fixed issue #1850: Grammar mistake

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Added Catalan language pack

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Fixed issue #1746: Pressing "Delete" on keyboard should delete selected non versioned file in commit dialog

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Changed File Dialog: Show subfolder name on title bar if available

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>