Added new experimental section that allows you to cut objects based on current clipping planes in the scene. The difference from other clipping plane methods - it actually (temporarily) edits meshes geometry and adds cappings at the cut. So, the clipped meshes can be seen both on render and cutted parts won't get in the way as they do with temporary section cutaways (shader based method)
Example - https://imgur.com/a/SOqovOM
bim.reassign_class wasn't considering that root.reassign_class will also reassign class for occurrences of the same type and was reaccessing invalid elements