mirspan

Results 2 issues of mirspan

Add the calibration cube to the test in the slicer. I have prepared a calibration cube and attached it to the message in the archive *.zip. [calibration-cube.zip](https://github.com/SoftFever/OrcaSlicer/files/13778287/calibration-cube.zip)

**Add export options** 1. Export only the changed settings. 2. Export all settings.

Type : Enhancement
Status : Extra infos needed