F8 reached ORTHO as an ordinary command, and dispatching a command tears
down whatever is running first: the active command dropped, its preview
cleared, its base point forgotten. So pressing F8 partway through a LINE
abandoned the line, and during a MOVE it took the dragged ghost with it.
A function key gets pressed mid-command — that is what it is for.
Toggles that only flip a flag now skip the teardown: ORTHO, GRID, SNAP,
POLAR, and the drafting-settings popup. None of them starts a command,
opens a document or reads geometry, so there is nothing for the teardown
to protect.
F7, F9 and F10 came through the same path and were broken the same way;
they are fixed with F8. F3, F11 and F12 already had messages of their
own and were never affected.
Closes#677
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
039f703d7f