Session Warning: Prevent timeout overflow for large session ages (#12547)

Author: Maffooch

dojo/templates/base.html

@@ -1120,7 +1120,7 @@ <h4 class="modal-title" id="sessionModalLabel">Session Expiring Soon</h4>
 
                         setTimeout(() => {
                             $('#sessionTimeoutModal').modal('show');
-                        }, timeout * 1000);
+                        }, Math.min(timeout, 2147483) * 1000); // Do not allow a buffer overflow here
 
                     }  
                     session_notifcation();