When pressing escape soon after left clicking (within ~60ms), KiCad
was processing the escape key before the mouse button release event
due to wxWidgets event queue ordering. This caused operations to be
canceled instead of completed.
The fix adds flushPendingClicks() which checks button state via polling
when an escape key event arrives. If a button was logically pressed but
has been physically released, the click event is generated before the
escape event is processed, maintaining proper ordering.
Fixes https://gitlab.com/kicad/code/kicad/-/issues/20527
(cherry picked from commit b9327dbe7e)
Seth Hillbrand
8a839ac851