Use normal `background-image` properties with SVGs now
that IE 8 and Android 2.1 is removed from Grade C.
Also removing all PNG fallback images.
Bug: T248062
Change-Id: I27d95241b6512f36985f7269122802d7b0962042
throughout
* Still need to redo how we're using mixins, but whatever.
* Cleans up a bit from the edit/view source etc changes too, since now
we have a little more context (oops)...
* Just hide 'view' in general because a, how much does it really add,
and b, it doesn't fit in a lot of cases when we have the extra width
from these icons regardless.
* Rename view and add section tabs to make more sense with icons/in
context/whatever ('view' is now only targeted at screen readers, and
we use a + for the new section icon, so saying 'add' is kinda...
redundant)
Bug: T197520
Change-Id: I1ab12ccda60e51035c4adec43c42508ac297c00a
For some reason the margin was on the ul, and I have no clue why.
Breaks stuff like wikibase, announcements, anything doing non-ul
portlet content, really.
Change-Id: I201a777547d8bd1b674c8c5d987ab77d4130bfcf
No more need to add in an html pokey element every potential dropdown menu.
Aaaaaagh that made it bigger, didn't it.
Change-Id: I5d3817aa026849a5304710a32a3585f3e698321d