...to make those usable on other architectures as well!

These few tweaks have been proposed by Remote Systems.
Suggested-by: Erik Palvanov <erik@rem-sys.ru>

This was problematic with some builds:
https://bugzilla.altlinux.org/show_bug.cgi?id=31918
https://bugzilla.altlinux.org/show_bug.cgi?id=32320
...but that's been overcome.
Suggested-by: Andrey Cherepanov <cas@altlinux.org>

These mostly come from m-p-d but have been heavily reworked
for the new workstation distro, here's a list of the
typical changes:

- changed X-Alterator-Parent from centaurus-desktop
  to a more fine-grained toplevel entry;
- tweaked Categories for the desktop file (e.g. pidgin);
- packages added or removed (like sane to scanning);
- adapted for m-p's biarch support scheme (see emulators);
- renamed more appropriately (for example, 3d -> blender);
- improved descriptions (e.g. by adding specific product
  names to groups referencing single-package lists).

Several ones were done from scratch.

NB: lists/groups have been moved into workstation/
    and intersynced accordingly.