Panes with large data sizes may load in after swapping away from the env they're fetched for.

I have an visdom environment with large images in environment '0' and I'm accessing the server remotely. When I load the environment '0', the first image takes a long time to load and loads in '0'. If I then change to environment '1' on the webpage, the rest of the images load in the environment '1', even though they were assigned to '0'. No big deal, just wanted to file a report for it.