Restoring 2D Latency Scan Histogram to VFAT_Histograms

[bdorney]

Description

Addressing comment made here

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

It's sort of a bug fix...

Motivation and Context

See above.

How Has This Been Tested?

Re-analyzed previous raw.root file.

Screenshots (if appropriate):

Note this run had one of the PMTs turned off so all triggers did not really go through the detectors so plot is expected to be ~empty.

Checklist:

• [ ] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [x] I have added tests to cover my changes.
• [x] All new and existing tests passed.