Add multiple Layer at once in WAB group filter widget

[Christopher28]

In ArcGIS Enterprise WebApp Builder I use a WebMap with more than 50 layers. Now I want to create a group filter for all layers because all layers have an identical filter field. This works perfectly, but it is very tedious to select each layer individually via the selection list in the group filter widget.

Therefore, it would be a good option if I could select and add several or all layers at once in the selection list.

Thanks

Christopher