### 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.
} break;
		case NOTIFICATION_TRANSLATION_CHANGED: {
			_invalidate_theme_cache();
			_update_theme_item_cache();
			if (!embedder && window_id != DisplayServer::INVALID_WINDOW_ID) {
				String tr_title = atr(title);
#ifdef DEBUG_ENABLED
				if (window_id == DisplayServer::MAIN_WINDOW_ID) {
					
					
					
					tr_title = vformat("%s (DEBUG)", tr_title);
				}
#endif
				DisplayServer::get_singleton()->window_set_title(tr_title, window_id);
			}
		} break;
		case NOTIFICATION_VISIBILITY_CHANGED: {
			if (unparent_when_invisible && !is_visible()) {
				Node *p = get_parent();
				if (p) {
					p->remove_child(this);
				}
			}
		} break;
		case NOTIFICATION_EXIT_TREE: {
			if (transient) {
				_clear_transient();
			}
			if (!is_embedded() && window_id != DisplayServer::INVALID_WINDOW_ID) {