## Link to GitHub Issue or related Pull Request, if one exists
#814
## Description of change
Switch over Nostalgia from wintouchemu to native touch hook.
Nostalgia has some strict timing requirements (touches must be updated
on every acio poll) so this takes a slightly different path to maintain
mouse holds.
Only a handful of consumers of wintouchemu remain:
1. beatstream - but it's off by default, only enabled as errata for
buggy touchscreens, or if the user forces it on (for Show Cursor)
2. gitadora single-window overlay - this is just for mouse so not a big
deal.
3. MFC HG mode - not a priority to fix.
## Testing
Tested full screen and windowed mode with touch / mouse / poke.
bicarusandGitHub
09ed8b948c