remove duplicate code
Mark conversion constructors of EigenMesh3D `explicit`
Working on mesh simplification for hollowed interior
Fix bug SPE-1074: crash with empty supports and disabled pad.
fix regression after refactor
Remove unfinished code
Fix missing includes and dumb comments
Bugfix: SLA support tree is is now given the hollowed mesh, not the original
Added ImGui separators and change background alpha in hollowing gizmo dialog (to match the other gizmos)