typeadmin preferences are stored in the session scope keyed by typename. If you have multiple typeadmins for the same content type they end up sharing the same set of preferences which can cause problems. Need to have the ability to nominate a unique id for a typeadmins session preferences to be stored under.

Proposing the addition of an extra attribute called ID which can be equal to any string. This will then be used as the key under which the grids preferences will be stored in the session scope. In the absence of the attribute it defaults to typename.