GUAC-1138: Store formatted start date within session wrapper.

guacamole/src/main/webapp/app/manage/templates/manageSessions.html

@@ -66,7 +66,7 @@ THE SOFTWARE.
                         <input ng-change="wrapperSelectionChange(wrapper)" type="checkbox" ng-model="wrapper.checked" />
                     </td>
                     <td>{{wrapper.activeConnection.username}}</td>
-                    <td>{{wrapper.activeConnection.startDate | date:sessionDateFormat}}</td>
+                    <td>{{wrapper.startDate}}</td>
                     <td>{{wrapper.activeConnection.remoteHost}}</td>
                     <td>{{wrapper.name}}</td>
                 </tr>