Better viewer for room images
At the moment all images are downloaded to ~/.cache/fractal
and rendered in the default image viewer.
While I see how many people would like this (yay for using the native / default image viewer), the GNOME image viewer would show previews of other images from that directory across the bottom. It's inter-mixing user avatars with photos from the current and all other rooms - that's not ideal. Especially if you want to browse the photos of the current room as a slideshow.