introduce a mechanism to exclude specific cuts from subsequent use

The main usage here is that if OR is run before MET we don't want to use the OR selections with MET.  A similar issue is expected to come up with fakes/fakeable objects, i.e. some specific baseline cuts should not be applied (in fact they are inverted), but only for very specific users.

The mechanism chosen here is to mark the cuts when they are registered and then exclude by name when requesting the selection.