Fix for TOC "click/expand" & "scroll position" problem on mobile.

Fixes:

 - Click/expand
 - Scroll pos.
 - TOC table scroll-down arrow.
 - TOC title scrolls to top.

Docker-DCO-1.1-Signed-off-by: O.S. Tezer <ostezer@gmail.com> (github: ostezer)
Merge pull request #5257 from ostezer/docs-fix-toc-click

Fix for TOC "click/expand" & "scroll position" problem on mobile.