Add UI for handling the case when an enterprise has reached its maximum seat count

endpoints/common.py

@@ -164,6 +164,7 @@ def render_page_template(name, **kwargs):
                                        is_debug=str(app.config.get('DEBUGGING', False)).lower(),
                                        show_chat=features.OLARK_CHAT,
                                        cache_buster=cache_buster,
+                                       has_billing=features.BILLING,
                                        **kwargs))
 
   resp.headers['X-FRAME-OPTIONS'] = 'DENY'