Experiment final values not handled for devices with custom UIs #58
Description
If you have a device with a custom UI, there is currently no way to handle the update of final values on transition_to_manual. This should be fixed (probably by providing a method that could be overridden by the subclass of DeviceTab and passed self._final_values, and then called by the DeviceTab.transition_to_manual method). We may also want to consider allowing devices to return new front panel values during transition_to_manual, although this does change the architecture a bit more and is more difficult to do than the former.