Edit additional apps for various roms

[Luis Manuel Sánchez Pérez]

Actually, if you select a lot of roms, you can edit some fields like "gender, emulator, platform, developer, etc" but there´s no way to select the same additional app for all of them, and you must do that one by one. I think is a good idea to enable this function, since some users like me, have a lot of roms and some of them requires the same .bat before the launch, and it´s a waste of time doing this one by one like I said, specially if you have for example a 3000+ roms collection.