With related changes to the DOM in the new Vector skin, most skin
styles are no longer necessary for Vector 2022.
This patch also fixes an issue with the font-size of the toolbar
when $wgVectorTitleAboveTabs = true.
Bug: T310197
Depends-On: Idae6755c90eacaab1a9daa88c6e28850d427810c
Change-Id: I6776f08b24f83cf4daeef70bfdeb73dfeafc785a
This data attribute, used to give skins the ability to position VE on the
page, should be prefixed with `data-mw` to prevent it being inserted on
the page by user generated content.
Bug: T310197
Change-Id: Ia6f87535f11ccc7aadb26b7dd9e1ac8a867c377c