i3: bar configuration after font declaration so that it gets inherited by i3bar
Xresources: apply font & background settings only to XTerm

If these settings are left in the configuration file without
the "XTerm" prefix, they are inherited by Qt applications.
xinitrc: ensure we set the proper keyboard configuration

I have set global keyboard configuration in
/etc/X11/xorg.conf.d/00-keyboard.conf but for some reason I need
to perform at least one keypress on my laptop for the layout to
be "propagated" to the external keyboard (which defaults to
QWERTY/US otherwise).

If we force the layout using setxkbmap inside xinitrc we don't
then have to resort to this kind of trick.