### 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.
Node *scene = editor_data.get_edited_scene_root(idx);
	if (!scene) {
		show_accept(TTR("This operation can't be done without a tree root."), TTR("OK"));
		return;
	}
	if (!scene->get_scene_file_path().is_empty() && _validate_scene_recursive(scene->get_scene_file_path(), scene)) {
		show_accept(TTR("This scene can't be saved because there is a cyclic instance inclusion.\nPlease resolve it and then attempt to save again."), TTR("OK"));
		return;
	}
	scene->propagate_notification(NOTIFICATION_EDITOR_PRE_SAVE);
	editor_data.apply_changes_in_editors();
	List<Ref<AnimatedValuesBackup>> anim_backups;
	_reset_animation_players(scene, &anim_backups);
	save_default_environment();
	_save_editor_states(p_file, idx);
	Ref<PackedScene> sdata;
	if (ResourceCache::has(p_file)) {
		
		
		
		sdata = ResourceCache::get_ref(p_file);
		if (sdata.is_valid()) {
			sdata->recreate_state();
		} else {
			sdata.instantiate();
		}
	} else {
		sdata.instantiate();
	}
	Error err = sdata->pack(scene);