### Godot version

v4.0.beta.custom_build [fab9926a9]

### System information

Fedora 37

### Issue description

When creating a new inherited scene, saving the scene (for example with Ctrl+S) defaults to overwriting the scene being inherited, instead of prompting for a location to save to.

### Steps to reproduce

1. Create a new inherited scene
2. Press Ctrl+S

If the scene being inherited is imported (for example from a glTF), an error displays. If the inherited scene is a .tscn or .scn, it gets overridden by an inherited scene that tries to inherit itself, which is impossible and thus corrupt.

### Minimal reproduction project

N/A
ProjectSettings::get_singleton()->setup(ProjectSettings::get_singleton()->get_resource_path(), String(), true);
	settings_changed = true;
}
void EditorNode::_vp_resized() {
}
void EditorNode::_titlebar_resized() {
	DisplayServer::get_singleton()->window_set_window_buttons_offset(Vector2i(menu_hb->get_global_position().y + menu_hb->get_size().y / 2, menu_hb->get_global_position().y + menu_hb->get_size().y / 2), DisplayServer::MAIN_WINDOW_ID);
	const Vector3i &margin = DisplayServer::get_singleton()->window_get_safe_title_margins(DisplayServer::MAIN_WINDOW_ID);
	if (left_menu_spacer) {
		int w = (gui_base->is_layout_rtl()) ? margin.y : margin.x;
		left_menu_spacer->set_custom_minimum_size(Size2(w, 0));
	}
	if (right_menu_spacer) {
		int w = (gui_base->is_layout_rtl()) ? margin.x : margin.y;
		right_menu_spacer->set_custom_minimum_size(Size2(w, 0));
	}
	if (menu_hb) {
		menu_hb->set_custom_minimum_size(Size2(0, margin.z - menu_hb->get_global_position().y));
	}
}
void EditorNode::_version_button_pressed() {
	DisplayServer::get_singleton()->clipboard_set(version_btn->get_meta(META_TEXT_TO_COPY));
}
void EditorNode::_update_undo_redo_allowed() {
	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
	file_menu->set_item_disabled(file_menu->get_item_index(EDIT_UNDO), !undo_redo->has_undo());
	file_menu->set_item_disabled(file_menu->get_item_index(EDIT_REDO), !undo_redo->has_redo());
}
void EditorNode::_node_renamed() {