Ignore external editor for built-in scripts

(cherry picked from commit 9abb07efb4c2a3ef1f3911fa50eb4fc46e1a16de)

editor/editor_node.cpp

@@ -2108,7 +2108,8 @@ void EditorNode::_edit_current() {
 
 		if (main_plugin) {
 			// special case if use of external editor is true
-			if (main_plugin->get_name() == "Script" && current_obj->get_class_name() != StringName("VisualScript") && (bool(EditorSettings::get_singleton()->get("text_editor/external/use_external_editor")) || overrides_external_editor(current_obj))) {
+			Resource *res = Object::cast_to<Resource>(current_obj);
+			if (main_plugin->get_name() == "Script" && current_obj->get_class_name() != StringName("VisualScript") && res && !res->get_path().empty() && res->get_path().find("::") == -1 && (bool(EditorSettings::get_singleton()->get("text_editor/external/use_external_editor")) || overrides_external_editor(current_obj))) {
 				if (!changing_scene) {
 					main_plugin->edit(current_obj);
 				}

editor/plugins/script_editor_plugin.cpp

@@ -1969,9 +1969,10 @@ bool ScriptEditor::edit(const RES &p_resource, int p_line, int p_col, bool p_gra
 	Ref<Script> script = p_resource;
 
 	// Don't open dominant script if using an external editor.
-	const bool use_external_editor =
+	bool use_external_editor =
 			EditorSettings::get_singleton()->get("text_editor/external/use_external_editor") ||
 			(script.is_valid() && script->get_language()->overrides_external_editor());
+	use_external_editor = use_external_editor && !(script.is_valid() && (script->get_path().empty() || script->get_path().find("::") != -1)); // Ignore external editor for built-in scripts.
 	const bool open_dominant = EditorSettings::get_singleton()->get("text_editor/files/open_dominant_script_on_scene_change");
 
 	const bool should_open = (open_dominant && !use_external_editor) || !EditorNode::get_singleton()->is_changing_scene();
@@ -2920,9 +2921,10 @@ Vector<Ref<Script>> ScriptEditor::get_open_scripts() const {
 
 void ScriptEditor::set_scene_root_script(Ref<Script> p_script) {
 	// Don't open dominant script if using an external editor.
-	const bool use_external_editor =
+	bool use_external_editor =
 			EditorSettings::get_singleton()->get("text_editor/external/use_external_editor") ||
 			(p_script.is_valid() && p_script->get_language()->overrides_external_editor());
+	use_external_editor = use_external_editor && !(p_script.is_valid() && (p_script->get_path().empty() || p_script->get_path().find("::") != -1)); // Ignore external editor for built-in scripts.
 	const bool open_dominant = EditorSettings::get_singleton()->get("text_editor/files/open_dominant_script_on_scene_change");
 
 	if (open_dominant && !use_external_editor && p_script.is_valid()) {