Localize formatting to 1 decimal [PREMIUM-1]

assets/js/src/num.js

@@ -0,0 +1,21 @@
+define('num',
+  [
+    'mailpoet'
+  ], function(
+    MailPoet
+) {
+  'use strict';
+
+  MailPoet.Num = {
+    toLocaleFixed: function (num, precision) {
+      precision = precision || 0;
+      var factor = Math.pow(10, precision);
+      return (Math.round(num * factor) / factor)
+        .toLocaleString(
+          undefined,
+          {minimumFractionDigits: precision, maximumFractionDigits: precision}
+        );
+    }
+  };
+
+});