Exchange Final Support Items at Store

For supports, item slot space doesn't really become a problem until mid-late game when you need a spot for a pink ward or if you really do need to build tank or AP to help your team. Let us exchange our Level 3 Active support items to the "Eye" combined sightstone items. + --> + --> + -->

Overall this takes away power from a support in the form of the Active ability and consumes sighstone (800g) so this exchange should be free and only work in 1 direction.