Resolve "Stop button behavior is confusing"

Duggan, Johnrequested to merge
159-stop-button-behavior-is-confusing into dev

Summary of Changes

Removed the upstream Galaxy stop buttons as they don't work as expected and I did not see an easy way to address it. I did bump the upstream Galaxy issue on this, and I will continue that conversation as eventually I'd prefer to use theirs.

I also replaced the blinker while stopping with a spinner similar to what Galaxy uses in other places.

As usual, I tested via a branch deployment to ndip-test.

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 #159 (closed)

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