Set initial value for header_filter in Tabulator

@Marc ,

  • I actually think Treeview used to work at some point using the Hierarchical Multi-Index Function. I’m pretty sure I had it working but then lost it in one of the package updates. I also don’t think the example on the doc site is functioning correctly.
  • No, because I can approximate the functionality with Perspective or a custom widget. I mostly use Panel for fun, so it didn’t seem worth bugging a developer over it.
  • Yes. See example here: Tabulator DataTree - #3 by riziles

Thanks,
Riz