Suggestion:preview of the panorama image

**Is your feature request related to a problem? Please describe.**
No, Just a suggestion to help the tagger better identify the target in the image.

**Describe the solution you'd like**
Some target distortion at the Pole-to-Pole(in the other say, it was the top and the bottom of the panorama image), annotationer didn't know what is it, need to see what it is.
[threejs-webgl_panorama_equirectangular](https://threejs.org/examples/webgl_panorama_equirectangular)
This is a project about the preview of the panorama image, maybe can add into the label-studio?

**Describe alternatives you've considered**
At this time, maybe the inbuilt preview of the panorama image, can help them to recognize the target and give the more accurate labels.

**Additional context**