Remove mock GameObject/Prefab code from managed MapEntity
Clean up Entity tool as you can no longer add/target games this way
# Conflicts:
# game/editor/Hammer/Code/Tools/EntityTool.cs
# game/editor/Hammer/Code/Tools/EntityTool/EntitySelector.cs
Remove Hammer EntityIO UI
Remove unused complicated stuff from worldbuilder: point templates, some hardcoded ents, dioramas, ...
remove nav markup volumes from fgd
ActionGraph source location refactor