The quick access presets where remembered by their running preset number (0-99). Unfortunately this number may change if the list is reordered by drag'n'drop. But the remembered QA preset numbers never change.
So the new approach is: remembering the UUIDs of every QA preset. And at time of saving the backup, the three QA UUIDs are converted back to the right running preset numbers (0-99).
To ensure consistency of
     NSMutableArray *_quickAccessPresets  and
     NSMutableArray *_quickAccessPresetsUUID
the arrays are removed from the interface. Access to the QA presets should only be possible via:
     (MFPreset *) getPresetForQASlot:(int)qaSlot;
     (void) setPreset:(MFPreset *)preset toQASlot:(int)qaSlot;