scope of renumbering measures
If a bar is renumbered, item noOffset appears in xml for this bar as an offset to internal numbering.
Only the number of the selected bar is displayed correctly, all following numbering remain untouched and wrong.
After reloading, all numbering is displayed correctly.
Perhaps the best way is adding noOffset after correction to all following bars up to a bar with a special and redraw all bar numbers after correction.
In the dialog for renumbering it would be helpful to show the internal numbering and the (editable) corrected number and to
save the difference as noOffset.