Headers should be clickable

[niftylettuce]

The content of the <h4> itself should be wrapped with an <a> tag.

[Flet]

using enableHeadingLinkIcons (true by default) will add a little link icon to the left of headers that is a clickable hyperlink that links to the heading (when hovering):

Is this good enough? Making the entire heading a hyperlink gets away from the default behavior of Github's markdown rendering, but we could add it as an option to turn on?

[niftylettuce]

Yeah, could we add that as an option?

[wetmore]

+1 to making it an option.

[niftylettuce]

bug bounty to whoever solves this one