- add clear oper in Virtools group panel. - add confirm window for clear Virtools groups opers. both panel and context menu.
- update enum prop into radio button display mode in bmx export and group name selections - move rename system into outline window right click menu. - add grouping operator to object menu in outline window.
- support select/filter by virtools group. - support group/ungroup/clear in object context menu. - improve virtools group visit functions