add new keys for minutes and seconds (s,m)

components/messages.js

@@ -116,6 +116,8 @@ export const labels = defineMessages({
   view: { id: 'label.view', defaultMessage: 'View' },
   cities: { id: 'label.cities', defaultMessage: 'Cities' },
   regions: { id: 'label.regions', defaultMessage: 'Regions' },
+  minutes: { id: 'label.minutes', defaultMessage: 'm' },
+  seconds: { id: 'label.seconds', defaultMessage: 's' },
 });
 
 export const messages = defineMessages({

components/metrics/MetricsBar.js

@@ -104,7 +104,13 @@ export default function MetricsBar({ websiteId }) {
                     -1 || 0
                 : 0
             }
-            format={n => `${n < 0 ? '-' : ''}${formatShortTime(Math.abs(~~n), ['m', 's'], ' ')}`}
+            format={n =>
+              `${n < 0 ? '-' : ''}${formatShortTime(
+                Math.abs(~~n),
+                [formatMessage(labels.minutes), formatMessage(labels.seconds)],
+                ' ',
+              )}`
+            }
           />
         </>
       )}