UX: Observe changes to plugin to hide/show plugin admin link without refresh.

app/assets/javascripts/admin/controllers/admin-plugins.js.es6

@@ -1,9 +1,16 @@
+import computed from 'ember-addons/ember-computed-decorators';
+
 export default Ember.Controller.extend({
-  adminRoutes: function() {
-    return this.get('model').map(p => {
-      if (p.get('enabled')) {
-        return p.admin_route;
+  @computed('model.@each.enabled_setting')
+  adminRoutes() {
+    let routes = []
+
+    this.get('model').forEach(p => {
+      if (this.siteSettings[p.get('enabled_setting')] && p.get('admin_route')) {
+        routes.push(p.get('admin_route'));
       }
-    }).compact();
-  }.property()
+    });
+
+    return routes;
+  }
 });