Fix test for "last updated" text.

Tools/GardeningServer/ui/ct-last-updated.html

Index: Tools/GardeningServer/ui/ct-last-updated.html
diff --git a/Tools/GardeningServer/ui/ct-last-updated.html b/Tools/GardeningServer/ui/ct-last-updated.html
index 388f766d75668b9568111237f4b884b5233119b1..92e3fab9ec08002b674197b22240e282a5e987d7 100644
--- a/Tools/GardeningServer/ui/ct-last-updated.html
+++ b/Tools/GardeningServer/ui/ct-last-updated.html
@@ -22,10 +22,7 @@ found in the LICENSE file.
         return date.getHours();
       },
       _minutes: function(date) {
-        var s = date.getMinutes().toString();
-        if (s.length == 1)
-          s = "0" + s;
-        return s;
+        return date.getMinutes().toString().padLeft(2, '0');
       },
     });
   })();