Add default_url fields to examples.

examples/app/main.py

@@ -25,7 +25,9 @@ def _jupyter_server_extension_points():
     ]
 
 class ExampleApp(LabServerApp):
+
     extension_url = '/lab'
+    default_url = '/lab'
     name = __name__
     load_other_extensions = False
     app_name = 'JupyterLab Example App'

examples/cell/main.py

@@ -63,6 +63,7 @@ class ExampleHandler(
 class ExampleApp(LabServerApp):
 
     extension_url = '/example'
+    default_url = '/example'
     app_url = "/example"
     name = __name__
     load_other_extensions = False

examples/console/main.py

@@ -64,6 +64,7 @@ class ExampleHandler(
 class ExampleApp(LabServerApp):
 
     extension_url = '/example'
+    default_url = '/example'
     app_url = "/example"
     load_other_extensions = False
     name = __name__

examples/filebrowser/main.py

@@ -63,6 +63,7 @@ class ExampleHandler(
 class ExampleApp(LabServerApp):
 
     extension_url = '/example'
+    default_url = '/example'
     app_url = "/example"
     load_other_extensions = False
     name = __name__

examples/notebook/main.py

@@ -69,6 +69,7 @@ class ExampleHandler(
 class ExampleApp(LabServerApp):
 
     extension_url = '/example'
+    default_url = '/example'
     app_url = "/example"
     name = __name__
     load_other_extensions = False

examples/terminal/main.py

@@ -64,6 +64,7 @@ class ExampleHandler(
 class ExampleApp(LabServerApp):
 
     extension_url = '/example'
+    default_url = '/example'
     app_url = "/example"
     name = __name__
     load_other_extensions = False