Fix all target="_blank" anchors to be safer

Fixes #1411

static/directives/trigger/custom-git/credentials.html

@@ -5,6 +5,6 @@
       <li>You must give the following public key read access to the git repository.</li>
       <li>You must set your repository to POST to the following URL to trigger a build.</li>
     </ul>
-    For more information, refer to the <a href="http://docs.quay.io/guides/custom-trigger.html" target="_blank">Custom Git Triggers documentation</a>.
+    For more information, refer to the <a href="http://docs.quay.io/guides/custom-trigger.html" ng-safenewtab>Custom Git Triggers documentation</a>.
   </p>
-</div>
+</div>

static/directives/trigger/custom-git/trigger-description.html

@@ -1,4 +1,4 @@
 <span>
   <i class="fa fa-git-square fa-lg" style="margin-right: 6px;" data-title="git" bs-tooltip="tooltip.title"></i>
   Push to {{ trigger.config.build_source }}
-</span>
+</span>