Update should be triggered on rename, not only on delete

[krassowski]

If the downloaded folder is moved the state should be updated too. Currently it only happens on delete:

jupyterlab-gallery/src/gallery.tsx

Lines 70 to 75 in 9de8f2c

	// if user deletes a directory, reload the state
	fileChanged.connect((_, args) => {
	if (args.type === 'delete') {
	this._load();
	}
	});