Adding keyboard shortcut to toggle notifications [S]

Change-Id: I5d69cb14141f4c484738920efee96f6c117527bc
(cherry picked from commit f37172583a9566708567e55a65f4426e7e5216d7)
diff --git a/src/app/core/debug/debug-summary.html b/src/app/core/debug/debug-summary.html
index 9807ac9..7e185da 100644
--- a/src/app/core/debug/debug-summary.html
+++ b/src/app/core/debug/debug-summary.html
@@ -41,5 +41,12 @@
                 <i class="fa fa-remove text-danger" ng-hide="vm.debugStatus.modelsTab"></i>
             </td>
         </tr>
+        <tr>
+            <td>Notifications</td>
+            <td class="text-right">
+                <i class="fa fa-check text-success" ng-show="vm.debugStatus.notifications"></i>
+                <i class="fa fa-remove text-danger" ng-hide="vm.debugStatus.notifications"></i>
+            </td>
+        </tr>
     </tbody>
 </table>
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