[Jungfrau][Correct] Avoid `NAN` disturbance for correction plots scale

Description

As clear from the plots while I have been looking through different plots from the latest corrections. I see JF4M has bad-scaled corrected plots. This is because of the NANs in the corrected data.

How Has This Been Tested?

Relevant Documents (optional)

jf4m_master.pdf

Types of changes

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

Checklist:

Reviewers

@schmidtp @kluyvert