Alt button "sticks" in Acme sometimes after commit c1bd38a
After applying commit c1bd38a Acme sometimes has issues with Alt key "sticking". From my observations it often happens after returning to Acme from other windows. Clicking mouse B1 behaves as B2. Pushing and releasing Alt key while Acme window is active fixes the problem but it can return later after switching to another window and returning to Acme.