Play Queue download/cache indicator issues

[eharris]

The new Play Queue screen is very nice, however the little triangle that indicates a cached file doesn't seem to update when songs are in the process of being downloaded unless you either scroll those items off screen and then back on-screen, or close and re-open the Play Queue.

And as a related feature request, it would also be very nice if there were some indication in the "Play Queue" screen that a track has been marked for downloading, and also showing the progress while it is downloading.