Use Error/Todo/Question/ModeMsg by default
Use Error/Todo/Question/ModeMsg by default

"bg" is used from Error (which is typically white on red), while "fg" is
used from the other groups.

euclio/neomake,nerdrew/neomake,datanoise/neomake,neomake/neomake,bonds/neomake,bonds/neomake,codeinabox/neomake,neomake/neomake,euclio/neomake,nerdrew/neomake