Location-based touch arbitration for tablets
Right now when the pen goes in to proximity, we disable the touch part of the tablet. We should be smarter about this and only disable the bits from N mm left of tip to the right edge of the tablet (and the opposite for left-handed mode).
If we have a tablet stylus tilt, we can use that too independent of/in addition to the left-handed setting.
Requires #144 (closed)