With apologies to anyone who gets a hundred merge conflicts
because of this :)
We had several different prefix styles (mlb-, mw-mlb-, mw-mmv-,
mw-mmv-mmv-, a few unprefixed), which was getting annoying,
and will be confusing to wiki editors who are trying to figure out
where a given style comes from. Such changes are better done before
going live because it breaks all local CSS tweaks on the wiki,
so I am renaming things now (also removing some stuff which wasnt
used anywhere).
Change-Id: I00447a25f0028e234169c6db941bedc99622eb8d
Adjustments of several styling aspects for the reuse file panel:
* Border style and colours to match the ones used in similar borders and Agora style
* Highlight the trigger also on hover
* Tweak the margins to avoid info on the embed panel to appear next to the edge.
Change-Id: I3a5448e3e81006ae35d2c18a9b2cbc2a6598210e