Additional tweaks to hide more elts in PHP output.

* The first line of the html now aligns perfectly.

* As far as I can tell, we now have a 1px line-height difference
  between the two renderings which accumulates across the page.

* The other noticeable diff seems to be in citation display where
  PHP has ext-link, pdf-link icons in citations. Plus Parsoid generates
  an up-arrow where PHP parser generates a carat (this probably
  comes from wiki site settings).