Depend on the atom in doSet, doModify, doRemove, ...

[polytypic]

Consider:

onClick={U.doSet(U.view(observable, atom), value)}

The above does not currently work, because U.view(observable, atom) is not subscribed to. This should be fixed by making it so that U.doSet (and friends) return an observable that subscribes to the atom (which is required when it is a Join atom).