A selected free text gets the corner handles of the previous commit:
dragging one sets the width the text wraps to, keeping the opposite
corner in place; double-clicking a handle goes back to the automatic
width. One undo step per drag, on the folio's undo stack. The handles
are hidden while the text is typed in.
DiagramTextItem shows the handles for a subclass that asks for them
(textResizeHandlesWanted()); only free texts do for now.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Beat Hangartner
2989f6cb4b