Layer combinations and the removal guard

When the visible layers or renovation filter change, the add-on does a full sync carrying the new scope. Blender then holds back any removal of 50 or more objects that is also over half the project, and asks Remove or Keep. A live pass that would remove that many (for example a Teamwork receive) becomes a full sync so the same question is asked.

Switching back sends only the elements that were hidden, because Blender already holds the rest.