Add help button to create repository dialog

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Do not show progress dialog if canceled

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Fix borders: CSVNIgnoreTypeDlg is not resizable

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