Update IV curve
Created by: mlj5j
IV curve data needs to be saved in csv files much like the SLDO scan data is saved. It would also be nice to update the visuals of the IV curve plot. I'm not a huge fan of the dotted green line that it uses now. The settings used with the SLDO scans look much nicer in my opinion so we should switch to those and see if we prefer that over the current one.