Unbind IntersectionOberserver after ImageState.LoadSuccess?

[Jayphen]

It appears that the IntersectionOverserver remains bound after LoadSuccess, which (unless I'm missing something) is unnecessary, since the image state has finalised.

Is it possible to remove the binding?

[designbyadrian]

I'd like this to be optional, because I'm looking for ways to detect whenever an image goes in or out of view.