Fix bug in static refinement

[lroberts36]

PR Summary

The re-definition of Mesh::root_level introduced in #1053 did not get correctly propagated through the static refinement related code (which operates on logical locations relative to the legacy tree). This PR fixes that issue, which had cropped up in Artemis.

PR Checklist

• [x] #1073 is merged
• [x] Code passes cpplint
• [ ] New features are documented.
• [x] Adds a test for any bugs fixed. Adds tests for new features.
• [x] Code is formatted
• [x] Changes are summarized in CHANGELOG.md
• [ ] Change is breaking (API, behavior, ...)
  • [ ] Change is additionally added to CHANGELOG.md in the breaking section
  • [ ] PR is marked as breaking
  • [ ] Short summary API changes at the top of the PR (plus optionally with an automated update/fix script)
• [x] CI has been triggered on Darwin for performance regression tests.
• [x] Docs build
• [x] (@lanl.gov employees) Update copyright on changed files

[lroberts36]

Agreed, we need to add a couple tests that use multi-tree forests. We have at least one that uses SMR, but the bug does not manifest if the base grid only requires one tree.

[lroberts36]

The updated gold files are in #1073, right?

Yeah, I added the new gold files required here (and in #1047) to v23 so that I didn't have to upgold a bunch of times.