Add description

jupyterlab_classic/app.py

@@ -103,6 +103,7 @@ class ClassicNotebookHandler(ClassicHandler):
 class ClassicApp(NBClassicConfigShimMixin, LabServerApp):
     name = "classic"
     app_name = "JupyterLab Classic"
+    description = "JupyterLab Classic - A JupyterLab Distribution with the Classic Notebook look and feel"
     app_version = version
     extension_url = "/classic/tree"
     load_other_extensions = True