Add Role gradients & Role Icons

Role gradients are awful imo and a lot of people ik agree. I wish discord would let you disable them but even after like a year of it being around they still haven't. If fluxer adds this could you PLEASE make it so if a role uses two colours it would pick the hex code half way between both colours for users not wanting to see gradients. Gradients would disrupt how a user would want theirs to look like if there was no way to disable them. And some people find gradient text difficult to read.