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

TouchPanelState.UpdateGestures is still pretty wide after being reigned in; I'm
not sure if you will want to break up the switch/case the next time it grows.

Some properties were erroneously thrown in with Methods. I broke them out
as part of this, since the region task was already marked complete.
Fixed some parenthesis, braces, and newlines.

Old habits die hard.
Merge pull request #173 from 3vi1/monogame-sdl2

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