### 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.
case NOTIFICATION_WM_WINDOW_FOCUS_IN: {
			if (!is_in_edited_scene_root()) {
				if (has_focus()) {
					popped_up = true;
				}
			}
		} break;
		case NOTIFICATION_EXIT_TREE: {
			if (!is_in_edited_scene_root()) {
				_deinitialize_visible_parents();
			}
		} break;
		case NOTIFICATION_WM_CLOSE_REQUEST: {
			if (!is_in_edited_scene_root()) {
				_close_pressed();
			}
		} break;
		case NOTIFICATION_APPLICATION_FOCUS_OUT: {
			if (!is_in_edited_scene_root() && get_flag(FLAG_POPUP)) {
				_close_pressed();
			}
		} break;
	}
}
void Popup::_parent_focused() {
	if (popped_up && get_flag(FLAG_POPUP)) {
		_close_pressed();
	}
}
void Popup::_close_pressed() {