Overhaul scene loading and edit state management

editor/debugger/editor_debugger_node.cpp

@@ -167,7 +167,7 @@ void EditorDebuggerNode::_stack_frame_selected(int p_debugger) {
 void EditorDebuggerNode::_error_selected(const String &p_file, int p_line, int p_debugger) {
 	if (!p_file.is_resource_file() && !ResourceCache::has(p_file)) {
 		// If it's a built-in script, make sure the scene is opened first.
-		EditorNode::get_singleton()->load_scene(p_file.get_slice("::", 0));
+		EditorNode::get_singleton()->open_scene(p_file.get_slice("::", 0));
 	}
 	Ref<Script> s = ResourceLoader::load(p_file);
 	emit_signal(SNAME("goto_script_line"), s, p_line - 1);