Current UI structure only allows you to hit the heading link on hover. This should be a bug, but since the core behavior of arriving at the heading when a link is followed isn't broken on mobile, treating as a feature. Anyway, something smarter is needed.
Github demonstrates a pretty good target--mobile-friendly behavior and the ability to tab-navigate to the section links. CSS content attribute would also make for slightly lighter markup, though would eliminate easy configurability of section text.
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Comment #1
Grayside commentedhttp://drupalcode.org/sandbox/grayside/1876908.git/commit/1ea9811
This reduced code weight, made headings in general linkified hot-spots, and moved the on-hover section symbol out of the filter & configuration and into CSS. And for the keyboard-friendliness, tab-navigation by virtue of native browser support for jumping to each link on the page.