ENH: Add configuration for white/black list of showing things based on gate_version

[Xiphoseer]

This issue is a bit difficult to do because not every place checks the Objects table and only that has this flag...

This would mean adding lots of special case checks all over the place to properly hide stuff.

IMHO, hiding/whitelisting/blacklisting based on a gate_version col (same name in all tables that have it) would be easier.

[aronwk-aaron]

That works as well! Gate version also makes more sense in general