Add option for using popular tags in list of categories

Added a flag in the AutoCat edit dialog for using Popular Tags along with the Steam supplied "Genres". Each GameEntry gets a new field called "Tags" which function similarly to Genres, but I figured it would be better to separate them out.

It's not super ideal, but at the very least you can rip out the regex and use that for something else.

Also, sorry about the regenerated resx and Designer files. Apparently my VS instance just stomped all over that