Use IDs to reference post merge action menu buttons

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
Add Push after successful Merge in progress dialog

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
Fixed issue #2234: Config file mess up if not end with LF

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