The new A/P implementation does not contain the hardcoded "helper" functions
anymore. The properties created in these helpers are now generated by
autopilot components defined in generic-autopilot-helper.xml which is
included by default in preferences.xml
Currently, there are some hard coded autopilot helpers.
They can (and should) easily be modeled in an external XML file.
The filter in this file produce the exact same output as the hard coded
filters.
This is just a preparation step for a smooth transition at a later time.