Feature request: Adjust tilt position without recalibration

[Aestheticus42]

When calibrating to a new resin vat, I don't think I set the tilt position high enough and I'm getting adhesion issues on the front of the plate. It would be nice to be able to adjust the tilt position without needing to empty and clean the vat, and then running the entire calibration process again. It would also make it a lot easier to swap between vats if a vat had a known tilt position already.