How to Have Label Refer to Multiple Images

**Is your feature request related to a problem? Please describe.**

When creating a custom labeling interface where you want each task to have two potential images you can label I would like a way to have a Label (Keypointlabel etc. ) object be applicable to both images. Right now the “toName” field only seems to refer to a single image. It would be nice not to have to create separate Label objects on the interface for both images.

**Describe the solution you'd like**
Perhaps modifying the toName attribute in label objects to refer to a list of images.

**Describe alternatives you've considered**
N/A

**Additional context**
Add any other context or screenshots about the feature request here.