This works around DRI3 problems resulting in caja getting
BadWindow with panel applets subsequently failing to jump
into dock (which doesn't exist just yet):

* setup-libgl-dri3-disable tunes libGL to avoid DRI3,
* setup-mate-nocomposite asks MATE to avoid compositing.
Suggested-by: Denis Medvedev <nbr@altlinux.org>

PS: added setup-mate-terminal while at that to work around
the weird theming problem resulting in dark gray on black
colour scheme in Terminal; note that there's a fork here:
pkg.in/lists/workstation/mate (wasn't avoidable easily
at the moment).