U2 DAOController: Handle the underlying DAO's model changing
U2 DAOController: Handle the underlying DAO's model changing

This happens when eg. switching DAOs in the Browser to one with a different
model, eg. Origins and Experiments in the experiments framework.

foam-framework/foam,jlhughes/foam,jlhughes/foam,foam-framework/foam,jlhughes/foam,foam-framework/foam,foam-framework/foam,foam-framework/foam,jlhughes/foam