Subclass of QMessageBox which re-implements the static public
functions. There are two reasons for this:
1) The QMessageBox implementation on OSX does now show the title
string. This leads to message boxes which don't make much sense. So on
OSX we set title to text and text to informative text.
2) If parent is NULL, we set parent to MainWindow::instance. This
prevents message boxes which can go behind MainWindow

This allows you to determine if full parameter list is ready if you
missed the parameterListUpToDate signal.

This allows you to determine if full parameter list is ready if you
missed the parameterListUpToDate signal.

Fixed race issues in config upload, tested to be reliable now - board startup scripts now need the other half of testing

Minor improvements in airframe config, param transfer / reboot are still not quite doing what we want

- minor refactor of airframeconfig.cc
- add placeholder for new scratch build multirotor

Add persistRcValuesButt to allow mappings to be persisted outside the
calibration mode; cleanup const params in param dataq model;  add some
debug for mapping problems