[texodus]

This PR adds support for reset notifications to the Client's public event API, which closes a configuration gap - specifically, a Table instantiated from a View in a different Client (e.g., a local Table made from a virtual python View), without an index column, had no mechanism to receive reset notifications that precede a replace() or clear().

Breaking

Python "row"-mode on_update callbacks now receive (port_id, delta, reset), so all Python callbacks will need to be updated.

def cb1(port_id, delta, reset):
    pass
   
view.on_update(cb1, mode="row")