Add a public URL field for monitors and uses it on the status page (#5435)

Co-authored-by: Adam Stachowicz <saibamenppl@gmail.com>

server/socket-handlers/status-page-socket-handler.js

@@ -211,6 +211,10 @@ module.exports.statusPageSocketHandler = (socket) => {
                         relationBean.send_url = monitor.sendUrl;
                     }
 
+                    if (monitor.url !== undefined) {
+                        relationBean.custom_url = monitor.url;
+                    }
+
                     await R.store(relationBean);
                 }