- When no data trains to correct skip plots gracefully before checking corrected data.
- When no lit frames available to correct, make this very clear by replacing empty list with a message of no frames to correct
- Show shutter configuration for SPB and MID.
- check shutter function to check shutter configuration.

decide on splitting the change in two and have the current branch only for introducing rel_gain_mode and next branch for replacing rel_gain with rel_gain_mode to have one parameter only