Cannot copy paste polygons/masks when the label interface is defined as a image list (valueList = $images)

[alessandro-oe]

Describe the bug
It is not possible to copy paste polygons/masks labels between different images in the list when the label interface is defined as a image list (valueList = $images)

<Image name="imgs" valueList="$images" zoom="true"></Image>

Currently it copy pasting works only between the first image of different tasks but not within different images in the list of the same tasks or in different tasks

To Reproduce
Steps to reproduce the behavior:

1. Define labeling interface like as above
2. Create polygon on first image
3. Try to copy and paste the polygon to second image in the same task
4. Polygon will not be pasted to the second image

Expected behavior
I expect to be able to copy paste a polygon for examples between different images in the list
Seems this PR will possibly fix it

#8862

Environment (please complete the following information):

• OS: ubuntu
• Label Studio Version: latest with docker

Additional context
We are considering moving to label studio as our labeling platform and labeling services. Our team works a lot with change detection. It is very useful to configure the labeling interface as a list of images and add polygons/masks to both the first and second image using different labels, often copy pasting between the two.