Change image_fit based on image orientation/aspect ratio

[curtisbarnard]

In general landscape images display well with image_fit: cover. Most portrait images do no though and would work better with contain. I was think it might be nice to have an option to switch to contain for images that have a portrait orientation or have some aspect ratio that indicates a portrait orientation.

[dallingham]

A related enhancement would be to allow the option of requesting two side-by-side pictures for portrait mode pictures. The Google Home devices do this. Since their orientation is landscape, when they show portrait pictures, they show two portrait pictures side-by-side, which does a good job of filling the display.