[Feature Request] Navigation Icons for Static, Async

[Digicrat]

It would be helpful if the navigation index on the right indicated if a method or member was Static or Async. This information is provided when looking at the definition, but it would give us better-docs if it was duplicated in the navigation bar.

Async could be indicated by an icon (ie: (A)) in the margin. Static could be marked in a similar way, or even better split out into it's own heading.