Since the host is pinned to the top without any animation, it would look
jarring for the crown to fade away from the old panel (and at a 50ms
duration).
All other similar UI components have required dependencies, so this is
mainly to bring things in line with expectations. I am using this fact
in the skin editor to only show components which can be used in the
current editor context (by `try-catch`ing their
`Activator.CreateInstance`).