Blender Git Commit Log

Depsgraph: Add special cases to deal with multiple objects selection update

The idea then is to avoid doing depsgraph tag for each of the object which
selection is changed (which could be tricky to do anyway due to lots of areas
of selection code where this could happen), and simply tag scene's with
selection update tag.

This will involve synchronization of flags from base to objects, which is
rather cheap anyway.