Make "Access as Unique Name" a shortcut

The shortcut's name is "scene_tree/toggle_unique_name", not mapped to anything by default.

It also dynamically changes the text based on whether or not the unique name is going to be enabled or disabled.

Finally, it spaces the shortcut in the menu close to "Copy Node Path" if possible.

editor/scene_tree_dock.cpp

@@ -135,6 +135,8 @@ void SceneTreeDock::shortcut_input(const Ref<InputEvent> &p_event) {
 		_tool_selected(TOOL_ERASE, true);
 	} else if (ED_IS_SHORTCUT("scene_tree/copy_node_path", p_event)) {
 		_tool_selected(TOOL_COPY_NODE_PATH);
+	} else if (ED_IS_SHORTCUT("scene_tree/toggle_unique_name", p_event)) {
+		_tool_selected(TOOL_TOGGLE_SCENE_UNIQUE_NAME);
 	} else if (ED_IS_SHORTCUT("scene_tree/delete", p_event)) {
 		_tool_selected(TOOL_ERASE);
 	} else {
@@ -1073,6 +1075,14 @@ void SceneTreeDock::_tool_selected(int p_tool, bool p_confirm_override) {
 			if (first_selected == nullptr) {
 				return;
 			}
+			if (first_selected->get() == EditorNode::get_singleton()->get_edited_scene()) {
+				// Exclude Root Node. It should never be unique name in its own scene!
+				editor_selection->remove_node(first_selected->get());
+				first_selected = editor_selection->get_selected_node_list().front();
+				if (first_selected == nullptr) {
+					return;
+				}
+			}
 			bool enabling = !first_selected->get()->is_unique_name_in_owner();
 
 			List<Node *> full_selection = editor_selection->get_full_selected_node_list();
@@ -2864,10 +2874,13 @@ void SceneTreeDock::_tree_rmb(const Vector2 &p_menu_pos) {
 			}
 		}
 		if (all_owned) {
-			menu->add_separator();
-			menu->add_icon_check_item(get_theme_icon(SNAME("SceneUniqueName"), SNAME("EditorIcons")), TTR("Access as Scene Unique Name"), TOOL_TOGGLE_SCENE_UNIQUE_NAME);
-			// Checked based on `selection[0]` because `full_selection` has undesired ordering.
-			menu->set_item_checked(menu->get_item_index(TOOL_TOGGLE_SCENE_UNIQUE_NAME), selection[0]->is_unique_name_in_owner());
+			// Group "toggle_unique_name" with "copy_node_path", if it is available.
+			if (menu->get_item_index(TOOL_COPY_NODE_PATH) == -1) {
+				menu->add_separator();
+			}
+			Node *node = full_selection[0];
+			menu->add_icon_shortcut(get_theme_icon(SNAME("SceneUniqueName"), SNAME("EditorIcons")), ED_GET_SHORTCUT("scene_tree/toggle_unique_name"), TOOL_TOGGLE_SCENE_UNIQUE_NAME);
+			menu->set_item_text(menu->get_item_index(TOOL_TOGGLE_SCENE_UNIQUE_NAME), node->is_unique_name_in_owner() ? TTR("Revoke Unique Name") : TTR("Access as Unique Name"));
 		}
 	}
 
@@ -3420,6 +3433,7 @@ SceneTreeDock::SceneTreeDock(Node *p_scene_root, EditorSelection *p_editor_selec
 	ED_SHORTCUT("scene_tree/make_root", TTR("Make Scene Root"));
 	ED_SHORTCUT("scene_tree/save_branch_as_scene", TTR("Save Branch as Scene"));
 	ED_SHORTCUT("scene_tree/copy_node_path", TTR("Copy Node Path"), KeyModifierMask::CMD_OR_CTRL | KeyModifierMask::SHIFT | Key::C);
+	ED_SHORTCUT("scene_tree/toggle_unique_name", TTR("Toggle Access as Unique Name"));
 	ED_SHORTCUT("scene_tree/delete_no_confirm", TTR("Delete (No Confirm)"), KeyModifierMask::SHIFT | Key::KEY_DELETE);
 	ED_SHORTCUT("scene_tree/delete", TTR("Delete"), Key::KEY_DELETE);