This is under the supposition that we can't set the column widths
on some Mac instances because the host controls haven't yet been
created. This is primarily conjecture based on looking at things
that have the *possibility* of going wrong. Why this only happens
in some installs is beyond me.
Fixes https://gitlab.com/kicad/code/kicad/issues/5479
Also don't load the footprints up front. The whole purpose of the
footprint-info stuff is to have enough info about the footprints to
filter them *without* loading. After that just load individual
footprints as we need them.
Fixes https://gitlab.com/kicad/code/kicad/issues/6177