Fix URL hash change

[daniel-wer]

As a result of this fix, hash changes in the URL will now be reflected in the tracing without a reload :) (There's a slight delay, where the hash changes back to the original value first and then to the correct value - this is because the hash is always rebuilt using the store as a ground truth)

URL of deployed dev instance (used for testing):

• https://___.webknossos.xyz

Steps to test:

• Check whether comment links still work
  • Create a comment with the string #1 and click on it, the node with id 1 should be activated
• Change the URL hash
  • Change the position in the URL hash, the tracing position should change accordingly

Issues:

• fixes Error when changing the position in the URL hash #3707

---

• Updated changelog
• Ready for review

[philippotto]

🎉