Convert all CoffeeScript to Javascript. See:

http://meta.discourse.org/t/is-it-better-for-discourse-to-use-javascript-or-coffeescript/3153

app/assets/javascripts/admin/controllers/admin_dashboard_controller.js

@@ -0,0 +1,32 @@
+(function() {
+
+  window.Discourse.AdminDashboardController = Ember.Controller.extend({
+    loading: true,
+    versionCheck: null,
+    upToDate: (function() {
+      if (this.versionCheck) {
+        return this.versionCheck.latest_version === this.versionCheck.installed_version;
+      } else {
+        return true;
+      }
+    }).property('versionCheck'),
+    updateIconClasses: (function() {
+      var classes;
+      classes = "icon icon-warning-sign ";
+      if (this.get('versionCheck.critical_updates')) {
+        classes += "critical-updates-available";
+      } else {
+        classes += "updates-available";
+      }
+      return classes;
+    }).property('versionCheck'),
+    priorityClass: (function() {
+      if (this.get('versionCheck.critical_updates')) {
+        return 'version-check critical';
+      } else {
+        return 'version-check normal';
+      }
+    }).property('versionCheck')
+  });
+
+}).call(this);