[AGIPD][FF][PC] Fixes for AGIPD HZ gain constants

Description

This MR provides collection of fixes needed to enable processing of gain constants for AGIPD HZ modules.

FF Histogramming

• Introducing ROI for analysis of data quality as it cannot been done for whole module due to only few installed ASICs.
• Introducing px_preview parameter to e able to change the pixel which is previewed.

FF

• Introducing possibility to plot data in log scale.
• Introducing px_preview parameter to be able to change the pixel which is previewed.
• Added boolean flag to have possibility to mask BP from darks.

FF Summary

• Exposing all fit parameters to allow applying the current processing values to fit histogram for control plot.
• Disabling QM notation for single modules.
• Changing plot size for better resolution.
• For performance plot load AGIPD data of the processed instance. This is needed as HZ modules are treated as separate detectors.

PC

• Added dark BP masking to properly sanitise constants.

How Has This Been Tested?

Tested with the FF and PC data in p900478 and for compatibility with other AGIPDs with data in p900508.

Relevant Documents (optional)

Types of changes

• Bug fix (non-breaking change which fixes an issue)

Checklist:

Reviewers

@schmidtp @kluyvert