Sticky keys work to modify the next keypress, but also have utility in being held to achieve certain behaviours such as making multiple selections with a mouse.
The current implementation of sticky keys does not account for the case where a sticky key is held longer than `release-after-ms`. In this case, the sticky key gets stuck.
This PR proposes releasing the sticky key 1ms after the key is released if `release-after-ms` has lapsed during the hold, so that the sticky key behaves like a momentary key for long holds.
I have tested this for the past few days and have found it fixes my use cases.
72a1520a84