Coach content icons missing from resources

[rtibbles]

@vahidmas reports:

On Studio, i can see that some folders have contents that are visible to coaches only. However, I can't see any distinctive marks once I'm in the folder with the resources themselves:

"There be coaches only resources":

Guess which one is which:

While the name of the resource is a valuable hint, I wonder whether it would be possible+useful to display the coach-only icon to make tracking easier?

This is not urgent in any way, but I would hope that as we get more coach-only resources, this would be useful.

[jtamiace]

Original design: