Update current state with a (possibly new) value associated with key

        If the key does not represent an existing entry, then ignore it

def update_current_state(self, wid, key, value):
        '''
        Update current state with a (possibly new) value associated with key

        If the key does not represent an existing entry, then ignore it
        '''
        cscoll = self.current_state()
        c_state = cscoll.get(wid, {})
        if key in c_state:
            current_value = c_state.get(key, None)
            if current_value != value:
                c_state[key] = value
                setattr(self, '_current_state_hydrated_changed', True)