The picker marked every pass it drew, including the one it closed in, so
for one pass after closing the dialog Escape handler still stepped aside
and a quick second Escape did nothing. The mark is now set only while the
picker stays open and cleared in the pass it closes (OK, Cancel, Escape or
a click outside); the picker also consumes the Escape it handles.
Test: the_escape_after_the_picker_closes_cancels_the_editor presses Escape
to close the picker and again in the very next pass, with no settling
frames: the editor cancels. It fails on the previous marking.
tylerjenningsw
3df7e8f77c