Add seal option to restore ui

src/restore.html

@@ -105,6 +105,13 @@
                                     <input type="text" class="form-control" ng-model="mountOptions.host" id="configureBackupHost" name="host" ng-disabled="busy" placeholder="Server IP or hostname" ng-required="provider === 'cifs' || provider === 'nfs'">
                                 </div>
 
+                                <!-- CIFS -->
+                                <div class="checkbox" ng-show="provider === 'cifs'">
+                                <label>
+                                  <input type="checkbox" ng-model="mountOptions.seal">Use seal encryption. Requires at least SMB v3</input>
+                                </label>
+                                </div>
+
                                 <!-- CIFS/NFS/SSHFS -->
                                 <div class="form-group" ng-show="provider === 'cifs' || provider === 'nfs' || provider === 'sshfs'">
                                     <label class="control-label" for="configureBackupRemoteDir">Remote Directory</label>