color status patch: Get a colorized status bar in mutt

Patch from https://thomas.glanzmann.de//mutt/#cstatus

Original-author: Thomas Glanzmann <thomas@glanzmann.de>
Signed-off-by: David Sterba <dsterba@suse.cz>
Merge branch 'color-status' of https://github.com/kdave/mutt-kz

* 'color-status' of https://github.com/kdave/mutt-kz:
  color status patch: Get a colorized status bar in mutt
curs: fix compiler warnings

Signed-off-by: Karel Zak <kzak@redhat.com>