## Link to GitHub Issue or related Pull Request, if one exists
Fixes#840
## Description of change
Currently, for subscreen games, mouse events are still delivered even
when the subscreen overlay window is not visible.
Change this so that the subscreen overlay must be active and under the
mouse cursor for the mouse-to-touch transformation to occur. Applies to
both native and wintouchemu.
## Testing
Needs to test everything again..
iidx:
- [ ] full screen with overlay
- [ ] single window with overlay
- [ ] two window
Test: mouse, poke, api, real touch screen
sdvx:
- [ ] full screen with overlay
- [ ] windowed
popn
- [x] full screen with overlay
- [x] window with overlay
- [x] dedicated window
gitadora
- [x] single window with overlay
- [x] dedicated sub window
nostalgia
- [x] fullscreen
- [x] windowed
test: poke
wintouchemu
- [ ] Do all of the above again with wintouchemu
bicarusandGitHub
7ccd938f9b