On versions prior to 516, some background transparency was achievable via the transparent-color skin parameter, but this was deprecated and expected to break in 516, anyway (Lummox mentions this uses some particularly old Windows features under the hood):
It would be neat if a similar effect could be doable on 516+, with our much better browsers.
This seems to be achievable via ViewComponent::SetBackgroundColor(), and because Lummox seems to think so, so I thought it'd be worth writing down formally.
And it would just be helpful if the background-color parameter was respected for browsers regardless of the transparent-ness.
