Allow to change rebase actions while rebasing

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Hide merge command on rebase dialog

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Fixed issue #1835: Question mark icons on committed unchanged files

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Fixed issue #1913: SVN DCommit Button in successful merge Dialog

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Fix some signed/unsigned warnings

Signed-off-by: Sven Strickroth <email@cs-ware.de>