Ulocking the "anisotropic" scaling checkbox will bake the transformation
into meshes to allow for scaling in world axes.
Optimized and templated the stl_transform functions, now also available for 3x3 matrices.
The Canvas3D::reload_scene() now maintains selection even if all volumes of an instance changed their IDs.
Fixed one bug of many in admesh library, where the face connectivity
was broken when removing a degenerate face. Likely there are some
similar issues left to be solved.
Placed a workaround to always recalculate face connectivity before slicing.
