Filename to Game matching should allow user interaction

[Marcos González Troyas]

When importing a bunch of games, if some of the games are not in the database, or the names of some are similar, it will assign the wrong game to the ROM file.

On this difficult choices the user should be given the option to decide. This idea is implemented in some tools like Fatmatch, which gives a rating (0 to 100) to the match likeliness, and allows you to decide a threshold under which it allows to choose the selection.

http://hyperspin-fe.com/files/file/7401-fat-match-media-renamer/

If the game imported is not in the database, I think is better to leave it unmatched than to match to a totally wrong game, which could be already on the collection, and merged with it, so the odd one is not shown on the list.