### 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.
ERR_MAIN_THREAD_GUARD;
	if (window_id != DisplayServer::INVALID_WINDOW_ID) {
		DisplayServer::get_singleton()->window_request_attention(window_id);
	}
}
void Window::move_to_foreground() {
	ERR_MAIN_THREAD_GUARD;
	if (embedder) {
		embedder->_sub_window_grab_focus(this);
	} else if (window_id != DisplayServer::INVALID_WINDOW_ID) {
		DisplayServer::get_singleton()->window_move_to_foreground(window_id);
	}
}
bool Window::can_draw() const {
	ERR_READ_THREAD_GUARD_V(false);
	if (!is_inside_tree()) {
		return false;
	}
	if (window_id != DisplayServer::INVALID_WINDOW_ID) {
		return DisplayServer::get_singleton()->window_can_draw(window_id);
	}
	return visible;
}
void Window::set_ime_active(bool p_active) {