The overlay buttons were outline-only with a transparent center, so the
pointer flickered between the ring and the hollow middle, and the
flicker made the more button's menu impossible to trigger. The buttons
now have a solid (semi-transparent) fill, the play glyph is filled, and
the pointer-gating feedback loop is gone. The overlay stays visible
while hovering a button (the states are OR-combined, since a child
button steals has-hover from the artwork detector).
cc
vicrodh
44628c03d4