STRETCH gets its own prompt machine instead of a special case inside the
shared MOVE/ROTATE/SCALE one. "Select objects" now repeats until Enter:
implied windows (crossing right to left), `C` and `W` windows, single
picks and All/Last/Previous (moved whole), Remove/Add. Vertices inside any
of the windows move. Enter or `Displacement` at the base point asks for a
displacement, and Enter at the second point uses the base point as the
displacement, as in AutoCAD. Polygon and fence selection say they are not
available yet instead of being misread.
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
