Improve aesthetics of uploaded icon integration

[Shampra]

Look at this FR :

Improve support for transparent and non-rectangle images, icons, and emoji's

@Kirill_Lem I believe they are using an image with transparency for their profile pic. The white in the image they attached should be “transparent”, and I think they expect that the background (blue-green “fibers” in this case) would show through instead of a white background in an oval.