gui: Use right variable for device ID in share dialog (fixes #5213)

gui/default/index.html

@@ -213,10 +213,10 @@
               </div>
               <div class="panel-footer clearfix">
                 <div class="pull-right">
-                  <button type="button" class="btn btn-sm btn-success" ng-click="addFolderAndShare(pendingFolder.id, pendingFolder.label, pendingFolder.deviceID)" ng-if="!folders[pendingFolder.id]">
+                  <button type="button" class="btn btn-sm btn-success" ng-click="addFolderAndShare(pendingFolder.id, pendingFolder.label, device.deviceID)" ng-if="!folders[pendingFolder.id]">
                     <span class="fas fa-check"></span>&nbsp;<span translate>Add</span>
                   </button>
-                  <button type="button" class="btn btn-sm btn-success" ng-click="shareFolderWithDevice(pendingFolder.id, pendingFolder.deviceID)" ng-if="folders[pendingFolder.id]">
+                  <button type="button" class="btn btn-sm btn-success" ng-click="shareFolderWithDevice(pendingFolder.id, device.deviceID)" ng-if="folders[pendingFolder.id]">
                     <span class="fas fa-check"></span>&nbsp;<span translate>Share</span>
                   </button>
                   <button type="button" class="btn btn-sm btn-danger" ng-click="ignoreFolder(device.deviceID, pendingFolder)">