### Godot version

4.1.dev (dc625bcbfc5b587ba8867481ee7a1f6a567c25d0)

### System information

Mageia 9, Linux

### Issue description

When importing a project in current `master`, the following error is raised for each asset that gets imported:
```
Attempting to parent and popup a dialog that already has a parent.
```

It seems to be raised once per asset, caused by the progress dialog.

CC @bruvzg

### Steps to reproduce

- Import a new project in Godot that contains importable assets, e.g. https://github.com/RPicster/godot4-demo-desert-light

### Minimal reproduction project

See above.
exiting = true;
	if (project_run_bar->is_playing()) {
		project_run_bar->stop_playing();
	}
	String to_reopen;
	if (get_tree()->get_edited_scene_root()) {
		to_reopen = get_tree()->get_edited_scene_root()->get_scene_file_path();
	}
	_exit_editor(EXIT_SUCCESS);
	List<String> args;
	for (const String &a : Main::get_forwardable_cli_arguments(Main::CLI_SCOPE_TOOL)) {
		args.push_back(a);
	}
	args.push_back("--path");
	args.push_back(ProjectSettings::get_singleton()->get_resource_path());
	args.push_back("-e");
	if (!to_reopen.is_empty()) {
		args.push_back(to_reopen);
	}
	OS::get_singleton()->set_restart_on_exit(true, args);
}
void EditorNode::_save_all_scenes() {