[ ] Get PulseAudio sound controls on polybar to work
[x] Add desktop switching to windows (context menu?)
[ ] Decide on an icon theme (flat-remix-icon-theme or pantheon.elementary-icon-theme?)
[ ] Use XDG???
[x] Add Mousepad (xfce) maybe
[ ] Make setting your wallpaper like. Global across everything because you
    do it with hsetroot on Openbox startup but not anywhere else (minus
    changing it with dconf)
[ ] Replace absolute paths (i.e. in openbox autostart file) with substituted
    paths generated by Nix (see substituteAllInPlace)
[ ] Consider using flakes