Unbundled giveaway list.

Since Steamgifts already tracks which games have been bundled in order to manage CV, it seems like it would be worth having an "unbundled" list in the "browse" menu (alongside All, Wishlist, Recommended, Group, and New), which only shows giveaways for games that are not on the bundled or free lists.

Of course, there's other ways for users to accomplish this (eg. by hiding bundled giveaways manually or, presumably, via extensions and the like), but since Steamgifts already maintains a list of bundled / previously-free games in its database, I assume that it would be a relatively-easy feature to implement and would avoid the need for people to redo the work that goes into making the free / bundled lists that SG already has.