[Bug] Cannot prevent creating self-intersecting features in polygon mode with editable option

[risusinf]

Providing validation function with ValidateNotSelfIntersecting test successfully prevents creating invalid geometries when finishing drawing, but it has no effect on editing in polygon mode.

Reproduce:
Provide validation function for polygon mode in options
Change existing polygon into self-intersecting shape

Sandbox: https://jsbin.com/deqisir/edit?html,output

[JamesLMilner]

Hey @risusinf thanks for raising this and can confirm I can reproduce. I think this might be tricky to fix - will need to have a think about the best way to tackle this because there's a question of what should happen when using editable and you release a drag event that fails validation i.e. it could restore to the last valid position, or restore back to the position before dragging. I would maybe want to get it consistent with Select mode so need to refresh myself with what happens there.

[risusinf]

Yes, i noticed how selfIntersectable: false works in select mode when tested this, providing the same functionality for polygon mode would be the most optimal and straightforward thing to do.