set english lang, avoid wrapping

web_src/css/modules/navbar.css

@@ -134,6 +134,7 @@
   justify-content: center;
   z-index: 1; /* prevent menu button background from overlaying icon */
   user-select: none;
+  white-space: nowrap;
 }
 
 .secondary-nav {

web_src/js/features/stopwatch.js

@@ -157,6 +157,7 @@ function updateStopwatchTime(seconds) {
       const el = document.createElement('relative-time');
       el.setAttribute('format', 'micro');
       el.setAttribute('datetime', datetime);
+      el.setAttribute('lang', 'en-US');
       parent.append(el);
     }
   }