Add parens to disc # recognition on import

[Matthew Laird]

I really like the functionality that was added to import multiple discs of the same game more intelligently, so that they only appear as a single entry in the LaunchBox interface. However, it looks to me like the only valid way to do that is if the filename ends with the string "Disc #" - I would like to request that the parsing logic also recognize "(Disc #)" since that seems to be a common scheme which is not currently imported correctly.

If the parser should be working correctly on files with parens already and I'm just doing something wrong, then I apologize! I did my best to check.

tldr: Support parsing "(Disc #)" in parentheses in filenames when importing games.

[Matthew Laird]

Okay, as I played around with this more, I was mistaken about exactly what the issue was.

It looks like the issue was actually whether or not I was using "Import ROM files" vs. "Scan for added ROMs" - when using the second method, it doesn't look like matching filenames were being combined into a single game. Parens had nothing to do with it, sorry for the confusion.

But there may be an issue with combining discs into a single when using the "Scan for added ROMs" workflow.