This approach simplifies the styling needed considerably.
Previously, we had to make room on the left for heading that
are in visual containers. Also we had to apply a `float:right`
when on narrow screens as the gutter not available then.
This float didn't render nicely if the heading text was longer
than could be rendered on a single line.
Closes#22131
This also prevents some extra `<a>` elements inserted by the browser's
trying to fix the HTML structure, which also fixes the `.header-link`
added in ToC.
Fixes#22387Closes#22437
PR Close#22446
Includes:
* display ToC for API docs
* update dgeni-packages to 0.24.1
* add floating sidebar in API docs
* add breadcrumbs and structured data for Google crawler
* improved rendering of method overloads
* properties rendered in a table
* params rendered with docs
* removal of outdated "infobox" from all API docs
PR Close#21874
Pete Bacon Darwin
George Kalpakas