Add missing display import

Author: edan-bainglass

qe.ipynb

@@ -20,9 +20,9 @@
    "outputs": [],
    "source": [
     "import ipywidgets as ipw\n",
-    "from importlib_resources import files\n",
-    "\n",
     "from aiidalab_qe.app import static\n",
+    "from importlib_resources import files\n",
+    "from IPython.display import display\n",
     "\n",
     "# load CSS stylesheets\n",
     "for stylesheet in [\"style\", \"custom\"]:\n",