Header Navigation inside a note

[goodsignal]

Adding to the cross-reference collection

ToC in a separate pane

Typora offers the possibility (with a css) to have all headers and subheaders listed in a TOC in a sidepane. That way, when one has a long document, one always has the TOC on the side and click to a relevant header when navigating. I use this a lot and would like it in Obs too.