The silent error `user error (createFontSet)` would break certain
modules (like the prompt) by simply not showing anything.
Pango 1.44 dropped support for FreeType in favor of HarfBuzz, losing
support for traditional BDF/PCF bitmap fonts. Hence, some distributions
don't ship `xorg-fonts-misc` anymore.
Fixes https://github.com/xmonad/xmonad-contrib/issues/348
Starting with 5240116f3c we only support
GHC versions 8.4.4 and up (more precisely, the GHC version associated
with stackage lts-12 and up). The imports in question are now in
Prelude and need not be imported explicitly.