Add crystvis features #12

[patrick-austin]

Closes #12 This adds support for relevant crystvis features through the Galaxy UI.

Note that the export screenshot will only output a blank image. EDIT: Having looked into this some more, integrating with the existing Galaxy screenshot buttons would require a change to Crystvis, to allow us to provide generate a renderer with WebGLRenderer({preserveDrawingBuffer: true}). There may be some further tinkering required in Galaxy, but this would be the first step.

How to test the changes?

(Select all options that apply)

• [ ] I've included appropriate automated tests.
• [ ] This is a refactoring of components with existing test coverage.
• [x] Instructions for manual testing are as follows:
  1. Login
  2. Open visualisations
  3. Select crystvis, and chose a cell or cif file
  4. Test features work as expected, and labels make sense

License

• [x] I agree to license these and all my past contributions to the core galaxy codebase under the MIT license.

[patrick-austin]

Regarding the failing tests: after syncing with the latest upstream code, Mulled Unit Tests / Test (3.7), Test Galaxy packages / Test (3.7), and Test Galaxy packages / Test (3.10) are all failing upstream in the 22.05 release branch. The cause of Build docs / build (3.7) failure is documented in #27

[github-actions[bot]]

This PR was merged without a "kind/" label, please correct.