Boolean site settings don't save immediately

app/assets/javascripts/admin/models/site_setting.js

@@ -23,10 +23,6 @@ Discourse.SiteSetting = Discourse.Model.extend({
     } else {
       // set the boolean value of the setting
       this.set('value', value ? 'true' : 'false');
-
-      // We save booleans right away, it's not like a text field where it makes sense to
-      // undo what you typed in.
-      this.save();
     }
 
   }.property('value'),

app/assets/javascripts/admin/templates/site_settings/setting_bool.js.handlebars

@@ -7,3 +7,13 @@
     {{unbound description}}
   </label>
 </div>
+{{#if dirty}}
+  <div class='setting-controls'>
+    <button class='btn ok no-text' {{action save this}}><i class='fa fa-check'></i></button>
+    <button class='btn cancel no-text' {{action cancel this}}><i class='fa fa-times'></i></button>
+  </div>
+{{else}}
+  {{#if overridden}}
+    <button class='btn' href='#' {{action resetDefault this}}><i class="fa fa-undo"></i>{{i18n admin.site_settings.reset}}</button>
+  {{/if}}
+{{/if}}