ObjectID converted to a structure, fixes many bugs where used incorrectly as 32 bits.

editor/dictionary_property_edit.cpp

@@ -190,5 +190,4 @@ bool DictionaryPropertyEdit::_get(const StringName &p_name, Variant &r_ret) cons
 }
 
 DictionaryPropertyEdit::DictionaryPropertyEdit() {
-	obj = 0;
 }