Add cifs seal support for volumes

src/views/volumes.html

@@ -44,6 +44,12 @@
                 <input type="text" class="form-control" ng-model="volumeAdd.host" id="volumeAddHost" name="host" ng-disabled="volumeAdd.busy" placeholder="Server IP or hostname">
               </div>
 
+              <div class="checkbox" ng-show="volumeAdd.mountType === 'cifs'">
+                <label>
+                  <input type="checkbox" ng-model="volumeAdd.seal">{{ 'backups.configureBackupStorage.cifsSealSupport' | tr }}</input>
+                </label>
+              </div>
+
               <div class="form-group" ng-show="volumeAdd.mountType === 'sshfs'">
                 <label class="control-label" for="volumeAddPort">{{ 'volumes.addVolumeDialog.port' | tr }}</label>
                 <input type="number" class="form-control" ng-model="volumeAdd.port" id="volumeAddPort" name="port" ng-disabled="volumeAdd.busy">