Set symlog constant parameter

Duggan, Johnrequested to merge
69-fix-log-log-plots-on-stitching-tab into main

Summary of Changes

A parameter was missing for the symlog plots used by Vega that was causing our log-log plots in the stitching tab to be effectively linear for small values. I've set the constant roughly in line with how matplotlib recommends setting it. The charts still produce a subjectively worse output than the matplotlib equivalents, but I think this will be "better enough" until I have time to rework the stitching tab.

Checklist

  • The MR has a clear and concise title
  • Code is self-documented and follows style guidelines.
  • Automated tests are written and pass successfully.
  • Regression tests (e.g. manually triggered system tests, manual GUI/tool tests, ...) are performed to make sure the MR does not break anything (when applicable)
  • Readme file is present and up-to-date.

Documentation Updates

Additional Notes

Closes #69 (closed)

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