Calibration Messages minor update

.. add some sample files with calibration messages to the
   test/rides directory

.. remove the calibration marker color config (we can add it
   back if needed, but was in the wrong 'sequence' and is
   probably just a little bit *too* fine grained).
More MainWindow tidy

.. remove unneccessary class members

.. reorg to highlight where the remaining members need to
   migrate to
Remove qDebug from FitRideFile

.. commented out so can reuse when debugging etc.