A shape remembers whether its pivot was placed by hand: a hand-placed
pivot is saved and no longer follows the shape's centre when the shape
is resized. Dragging the pivot handle marked it as hand-placed, but the
undo step restored only the pivot and the position. After Ctrl+Z the
pivot was back at the centre and still marked as hand-placed, so it
stayed behind on the next resize and was saved as a <transform>.
pivotIsCustom becomes a property and goes into the pivot drag's undo
step, the same fix as #1367 for pictures.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Beat Hangartner
606a526344