Escape during a drag puts the toolbar back by its name. A toolbar deleted
while its title bar was dragged left the drag in place, so Escape docked
and moved another toolbar that had taken the name since. Deleting the
toolbar, or renaming it to a name that differs by more than case, now
ends the drag. The drag of another toolbar goes on.
The drag test also presses Escape in the frame of the first move after
the press, where no drag starts.
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