ux: more minor ds setting tweaks

public/app/plugins/datasource/stackdriver/partials/config.html

@@ -81,4 +81,6 @@
   </div>
 </div>
 
-<p class="gf-form-label" ng-hide="ctrl.current.secureJsonFields.privateKey"><i class="fa fa-save"></i> Do not forget to save your changes after uploading a file.</p>
+<div class="grafana-info-box" ng-hide="ctrl.current.secureJsonFields.privateKey">
+	Do not forget to save your changes after uploading a file.
+</div>