Make "or" bold

cc: #547

templates/front/update_timeout_modal.html

@@ -41,7 +41,8 @@
                         </p>
                         <p>
                             <span>Grace Time</span>
-                            – When a check is late, or has received a "start" signal, how long to wait to send an alert.
+                            – When a check is late, <strong>or</strong> has
+                            received a "start" signal, how long to wait to send an alert.
                         </p>
                     </div>
                 </div>