[FNA] Code Style: Tabbing, etc. - Touch/Input

TouchPanelState.UpdateGestures is still pretty wide after being reigned in; I'm
not sure if we will want to break up the switch/case the next time it grows.

Some properties were erroneously thrown into the methods region in TouchPanel.cs.
I broke them out as part of this task, since the region task was already marked
complete.