Add a method for restarting the editor to EditorInterface

doc/classes/EditorInterface.xml

@@ -206,6 +206,13 @@
 				Reloads the scene at the given path.
 			</description>
 		</method>
+		<method name="restart_editor">
+			<return type="void" />
+			<param index="0" name="save" type="bool" default="true" />
+			<description>
+				Restarts the editor. This closes the editor and then opens the same project. If [param save] is [code]true[/code], the project will be saved before restarting.
+			</description>
+		</method>
 		<method name="save_scene">
 			<return type="int" enum="Error" />
 			<description>

editor/editor_plugin.cpp

@@ -312,6 +312,13 @@ void EditorInterface::set_distraction_free_mode(bool p_enter) {
 	EditorNode::get_singleton()->set_distraction_free_mode(p_enter);
 }
 
+void EditorInterface::restart_editor(bool p_save) {
+	if (p_save) {
+		EditorNode::get_singleton()->save_all_scenes();
+	}
+	EditorNode::get_singleton()->restart_editor();
+}
+
 bool EditorInterface::is_distraction_free_mode_enabled() const {
 	return EditorNode::get_singleton()->is_distraction_free_mode_enabled();
 }
@@ -360,6 +367,7 @@ void EditorInterface::_bind_methods() {
 
 	ClassDB::bind_method(D_METHOD("save_scene"), &EditorInterface::save_scene);
 	ClassDB::bind_method(D_METHOD("save_scene_as", "path", "with_preview"), &EditorInterface::save_scene_as, DEFVAL(true));
+	ClassDB::bind_method(D_METHOD("restart_editor", "save"), &EditorInterface::restart_editor, DEFVAL(true));
 
 	ClassDB::bind_method(D_METHOD("set_main_screen_editor", "name"), &EditorInterface::set_main_screen_editor);
 	ClassDB::bind_method(D_METHOD("set_distraction_free_mode", "enter"), &EditorInterface::set_distraction_free_mode);

editor/editor_plugin.h

@@ -116,6 +116,7 @@ public:
 
 	Error save_scene();
 	void save_scene_as(const String &p_scene, bool p_with_preview = true);
+	void restart_editor(bool p_save = true);
 
 	Vector<Ref<Texture2D>> make_mesh_previews(const Vector<Ref<Mesh>> &p_meshes, Vector<Transform3D> *p_transforms, int p_preview_size);