Fix handling of logout event (#15323) (#15337)

Backport #15323

It appears that there is a slight bug in the handling of the data of logout event -
the javascript should be testing the data field of the data field for the logout
instruction.

Signed-off-by: Andrew Thornton <art27@cantab.net>

web_src/js/features/notification.js

@@ -66,7 +66,7 @@ export async function initNotificationCount() {
       } else if (event.data.type === 'error') {
         console.error(event.data);
       } else if (event.data.type === 'logout') {
-        if (event.data !== 'here') {
+        if (event.data.data !== 'here') {
           return;
         }
         worker.port.postMessage({

web_src/js/features/stopwatch.js

@@ -47,7 +47,7 @@ export async function initStopwatch() {
       } else if (event.data.type === 'error') {
         console.error(event.data);
       } else if (event.data.type === 'logout') {
-        if (event.data !== 'here') {
+        if (event.data.data !== 'here') {
           return;
         }
         worker.port.postMessage({