diff -r c37671f197c3 -r 9df336529b2f cms/app-client/app/helpers/is-checked.js
--- a/cms/app-client/app/helpers/is-checked.js	Sat Dec 03 02:49:59 2016 +0100
+++ b/cms/app-client/app/helpers/is-checked.js	Sun Dec 04 00:23:52 2016 +0100
@@ -1,4 +1,5 @@
 import Ember from 'ember';
+import _ from 'lodash/lodash';
 
 export function isChecked(params) {
     var dates = params[0];
@@ -6,12 +7,7 @@
         return false;
     }
 
-    var decade = [];
-    var next = params[1] + 10;
-    while(params[1] < next) {
-        decade.push(params[1]);
-        params[1] ++;
-    }
+    var decade = _.range(params[1], params[1] + 10);
 
     var filter = decade.filter(function(date){ return dates.indexOf(date) > -1; });
     if(filter.length === decade.length) {