Fix file upload issue

Author: PabloPiaggi

environmentfinder/App.ipynb

@@ -121,8 +121,8 @@
     "\n",
     "# This function updates the dropdown list when a new file is uploaded\n",
     "def updateWidget1ExampleConfiguration(*args):\n",
-    "    uploaded_filename = next(iter(Widget1UploadConfiguration.value))\n",
-    "    content = Widget1UploadConfiguration.value[uploaded_filename]['content']\n",
+    "    uploaded_filename = Widget1UploadConfiguration.value[-1]['name']\n",
+    "    content = Widget1UploadConfiguration.value[-1]['content']\n",
     "    upload_directory=\"upload\"\n",
     "    if not os.path.exists(upload_directory):\n",
     "        os.mkdir(upload_directory)\n",