### Godot version

4.1.1.stable

### System information

Godot v4.1.1.stable - Windows 10.0.19045 - Vulkan (Mobile) - dedicated NVIDIA GeForce RTX 2070 SUPER (NVIDIA; 30.0.15.1295) - Intel(R) Core(TM) i5-8400 CPU @ 2.80GHz (6 Threads)

### Issue description

When undocking the script editor so that it's floating, CollisionShape3D Shape Size handles stop working.

If they were visible on a Shape, they remain visible on that shape and still work for that shape; but they will not appear on any other collision object when selecting it.

If you launch the editor with the Script panel already in a floating state, no shape handles ever become visible.

If you dock the Script editor again, everything goes back to normal and works fine.

### Steps to reproduce

Create a 3D scene with some collision shapes.
Undock the Script editor

### Minimal reproduction project

N/A
const int child_count = tab_container->get_tab_count();
	for (int i = 0; i < child_count; i++) {
		if (Object::cast_to<ScriptEditorBase>(tab_container->get_tab_control(i))) {
			return true;
		}
	}
	return false;
}
void ScriptEditor::_prepare_file_menu() {
	PopupMenu *menu = file_menu->get_popup();
	const bool current_is_doc = _get_current_editor() == nullptr;
	menu->set_item_disabled(menu->get_item_index(FILE_REOPEN_CLOSED), previous_scripts.is_empty());
	menu->set_item_disabled(menu->get_item_index(FILE_SAVE), current_is_doc);
	menu->set_item_disabled(menu->get_item_index(FILE_SAVE_AS), current_is_doc);
	menu->set_item_disabled(menu->get_item_index(FILE_SAVE_ALL), !_has_script_tab());
	menu->set_item_disabled(menu->get_item_index(FILE_TOOL_RELOAD_SOFT), current_is_doc);
	menu->set_item_disabled(menu->get_item_index(FILE_COPY_PATH), current_is_doc);
	menu->set_item_disabled(menu->get_item_index(SHOW_IN_FILE_SYSTEM), current_is_doc);
	menu->set_item_disabled(menu->get_item_index(WINDOW_PREV), history_pos <= 0);
	menu->set_item_disabled(menu->get_item_index(WINDOW_NEXT), history_pos >= history.size() - 1);
	menu->set_item_disabled(menu->get_item_index(FILE_CLOSE), tab_container->get_tab_count() < 1);
	menu->set_item_disabled(menu->get_item_index(CLOSE_ALL), tab_container->get_tab_count() < 1);
	menu->set_item_disabled(menu->get_item_index(CLOSE_OTHER_TABS), tab_container->get_tab_count() <= 1);
	menu->set_item_disabled(menu->get_item_index(CLOSE_DOCS), !_has_docs_tab());
	menu->set_item_disabled(menu->get_item_index(FILE_RUN), current_is_doc);
}
void ScriptEditor::_file_menu_closed() {