Instructor dashboard niggles.

[kohlhase]

I am very happy with the new instructor dashboard. But in the use some annoyances appear.
I am collecting my niggles here.

• The updates for the gottos (e.g. "19 days ago" in red) are not working immediately (not even after a reload)
• The dashboard is currently mostly backwards looking (i.e. what has happened) and it should also contain more forward-looking elements, e.g. next quiz is due in three days, ...
• Color code the (un)graded/answered questions
• Maybe also a distinction into "information" and "alert" (e.g. via the color) would be helpful.
• Apparent Duplicatition: There is no way of distinguishing the two quiz tiles (which link to different instances of the quiz).
  
  I think there should only be one tile, since it is easy to get to the second from the first.
• there should probably be a way to get rid of the tiles, when they are "done".

[abchugh]

Most important (For now): Condense the tiles.