Use a low res and high res image in media detail #2907
Description
Summary:
While working on #2898, I realized that while the high-resolution image loads, the user should at least be shown a low res image for that duration.
As of now media detail simply keeps showing the low res image, so the image loads instantly. But going forward, when we try to show the original image in detail page, depending on the network the image might take some time to load.
It makes sense to show the thumb URL until then. Moreover, the thumb URL would already be cached as the user would have reached the details page on clicking the item in the list. So it would show up instantly.