Skeleton label creation in UI can produce a broken label definition

[zhiltsov-max]

Actions before raising this issue

• I searched the existing issues and did not find anything similar.
• I read/searched the docs

Steps to Reproduce

1. Create a task or project
2. Create a skeleton in the constructor:
   3 points: "right shoulder", "right elbow", "right wrist"
3. Upload annotations with such skeletons
4. Try to open the task. It opens, but UI will fail if the mouse is hovered on an annotation

Expected Behavior

The task opens without issues

Possible Solution

Apparently, something is broken in skeleton points handling in the UI constructor or label parser.

Context

No response

Environment