This replaces the Parts count which was rather pointless for a prim (it was either 1 if a child or the number of parts if the root).
This information is still avaliable on the "show object" command.
This is to deal with the hundred lines of command splurge when one previously typed "help"
Modelled somewhat on the mysql console
One can still type help <command> to get per command help at any point.
Categories capitalized to avoid conflict with the all-lowercase commands (except for commander system, as of yet).
Does not affect command parsing or any other aspects of the console apart from the help system.
Backwards compatible with existing modules.
These commands will display part/prim details for a given uuid or name
The "show object uuid" and "show object name" commands will now only display details for objects (i.e. not child parts in a linkset).
This is for consistency with the "delete object" commands which only delete objects, not parts.
The only times when ParentGroup might be null is during regression tests (which might not be a valid thing) and when scene objects are being constructed from the database.
At all other times it's not possible for a SOP not to have a SOG parent.
This fixes the problem for all architectures (hg as well as local and grid) and means we don't have to dupe code between connectors.
Not ideal in that it becomes non-modular, but methods in Scene.Inventory.cs should eventually be modularized anyway.