Clicking a lifted piece should have it back down

[kreibaum]

I've observed several users struggle to place pieces back down. They click the piece again. That just selects it again.

[kreibaum]

This is not super easy to do with the way I am currently tracking mouse interaction.

Putting the mouse down on the first click will already lift the piece. When I then release the mouse, I am in a situation where I "click on the lifted piece to put it back down". That prevents me from moving at all.

Looks like building this requires me to rewrite more of the mouse input.