## Link to GitHub Issue or related Pull Request, if one exists
related to #697
## Description of change
Add a new option that paints touch targets and touch points for jubeat;
gets enabled if there is a touch screen connected. This is to help
explain / debug issues when users have their touch screen issues, which
is usually due to misalignment.
Fix the touch targets being off by 1 pixel (center gap is 1px wider in
both directions).
Also, simplify the `improved` algorithm to simulate a finger and trigger
nearest-neighbor for the AC dimensions. In terms of touch performance
this is near identical to what we had before, but it allows us to draw a
nice debug overlay instead of just grids.
## Testing
Tested portrait and landscape versions of jb.
## Description of change
There was enough feedback that the current algorithm is not ideal for
most touch screens because most touch screens are not 24". In the
current algorithm touching the gap is no-op, so people think the game is
dropping touches.
This PR introduces a new algorithm that inspect touches on the gap and
triggers the nearest square.
## Testing
Tested landscape and portrait jubeat.
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