Use tabular figures for template statistics

We use tabular (not lining) figures everywhere else that we display
counts, so that they don’t shift around as the AJAX updates the numbers.

There’s a good explanation of the difference here:
https://www.fonts.com/content/learning/fontology/level-3/numbers/proportional-vs-tabular-figures

app/assets/stylesheets/views/dashboard.scss

@@ -27,7 +27,7 @@
   text-align: left;
 
   &-bar {
-    @include bold-27;
+    @include bold-27($tabular-numbers: true);
     box-sizing: border-box;
     display: inline-block;
     overflow: visible;