LuaState: fix for hanging configurator on slow MegaMol
LuaState: fix for hanging configurator on slow MegaMol

Read operations from the MegaMol graph are performed without locking
This might be dangerous if we manage to construct a situation where stuff is deleted from the MegaMol graph at a very bad time, but since it should be smart pointers everywhere...
UniStuttgart-VISUS/megamol,UniStuttgart-VISUS/megamol,UniStuttgart-VISUS/megamol,UniStuttgart-VISUS/megamol,UniStuttgart-VISUS/megamol