Extension not working via ssh with x11 forwarding

[garrofederico]

Hi! Thanks for this great extension!

I have one problem though, it doesn't seem to we working when I'm connecting via SSH to a server and use X11 Forwarding. I can see the images when I run cv2.imshow() but I don't get the the preview option when hovering on the image variable.

[lbf4616]

same issue