vim: don't consult colorcolumn blacklist before touching winhighlight
vim: don't consult colorcolumn blacklist before touching winhighlight

I was getting annoyed at the quickfix listing not "blurring" like other
windows on losing focus. We can blur without using colorcolumn thanks to
winhighlight; but we still keep the blacklist untouched because we don't
want to add the colorcolumn highlighting back on regaining focus.

wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent