Typography refresh (VectorBeta extension) makes heading font to big

This is a temporary fix that needs to be revisited when the
VectorBeta extension is changed.

What does this patch do:
* Turn off the dramatically increased font size of the first
  heading.
* [Removed] I tried to reset the font of the edit button next to
  the heading but that made it look different in Vector without
  the VectorBeta extension. Not a big issue.
* Re-add missing margin between aliases and TOC.
* Remove a superfluous max-with. The outer .wb-entity container
  already sets the exact same max-width.
* I rewrote the TOC styles. Currently the second line of the TOC
  always starts with one of the gray lines. With my change the
  gray lines always stick to the end of the links.

Bug: 57436
Change-Id: I7714c727e6da9184fd52fe677d5a2d254a2dfa52
Merge "Typography refresh (VectorBeta extension) makes heading font to big"