Proportional fonts in the mode line (one month test)

[Lars Ingebrigtsen <larsi@gnus.org>]

I've now switched master over to defaulting to proportional fonts in the
mode line.  Customise the `mode-line' face to get the old look back.

I've made the most obvious things that change size -- the U:-- thing,
the top/bot, and the line/col thing -- use the `min-width' spec, so
things should jump around (for those that care about that).

There's probably more things that should be handled that way, but we'll
take that as we go along.

This is just a test: If everybody hates this default, we won't proceed,
but we won't know unless we test it.  So we're now testing this on the
trunk for a month.  Vote in a month.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no