[BUG] Labels cannot be deleted

[rexy712]

Describe the bug When attempting to delete a label from within the Edit Shape>Extra>Labels menu, the client shows that the label is removed. But on the server, an error comes up in the logs:
WARNING - <user> tried to delete a non-existing label. (label.py:50)
Refreshing the webpage shows the label is indeed still there.

To Reproduce Steps to reproduce the behavior:

1. Create a Label via Edit Shapes>Extra>Labels menu
2. Delete the label
3. Refresh the page, navigate back to the menu.
4. Label has reappeared.
5. Server logs show the label failed to delete.

Expected behavior The label should be deleted.

Screenshots

https://user-images.githubusercontent.com/2442544/220191325-beb510c2-5cdd-44f4-82a7-7d6b207f6873.mp4

Desktop:

• OS: gentoo linux
• Browser: firefox 109.0.1, ungoogled-chromium 109.0.5414.119
• Version: 2023.1

Additional context This also makes the filter button show up which is what clued me in to the issue existing. I was testing out what labels did, then deleted them. I was expecting the filter button would disappear after deleting them and it still remained.

[Kruptein]

This is actually fixed on dev by the API rework.