-project settings are saved when changed

-load() was in the GDScript docs but missing in the scripting-different music for platformer 2D and 3D
-fix how documentation is generated, built in doc browser should be always up to date
-copypaste, scrolling, etc in  builtin doc
-built-in scripts get saved now (though debugger may not always work on them)
-Theme can be set to controls as a property

tools/editor/editor_node.cpp

@@ -3165,6 +3165,7 @@ Error EditorNode::export_platform(const String& p_platform, const String& p_path
 
 EditorNode::EditorNode() {
 
+	EditorHelp::generate_doc(); //before any editor classes are crated
 
 	singleton=this;