Additional webhook suggestions

I think optionally allowing bots to set user-defined custom colors for each webhook proxy, rather than just using the role or profile-defined colors, would be really, really nice. I would love to be able to set up Better-Discord-Pluralchum-like profiles with webhooks without even using anything like that! If that could be possible, your userbase would thank you. Very much so. I think having the role-color and then the profile-defined color be a default would probably be good though, in the absence of any bot-defined colors.