A dynamic dimension is drawn by its constraint at screen size; without
the constraint it is a bare dimension with stretched extension lines.
Those orphans now stay undrawn and unplotted, as in a viewer (#992).
- First-release drawings keep dynamic dimensions on
*LayerNameForDynamicConstraint; it counts as the dynamic layer.
- The hidden set is refreshed when constraints load, and the loader's
prepared wires (built before that) are not installed while it holds
anything.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>