show the SpeedGrader link on all assignments; fixes #4173
show the SpeedGrader link on all assignments; fixes #4173

It turns out that teachers like to use the SpeedGrader even for assignments
that aren't turned in online, instead of the Gradebook. That might change with
the improved Gradebook though.

Change-Id: I8b8b0620873a4adcc1f91db260d3cbfc02410071
Reviewed-on: https://gerrit.instructure.com/2980
Tested-by: Hudson <dfb64870173313a9a7b56f814c8e3b33e268497a@instructure.com>
Reviewed-by: Brian Whitmer <760e7dab2836853c63805033e514668301fa9c47@instructure.com>
Reviewed-by: Brian Palmer <3cb4e1df5ec4da2c7c4af7c52cec8cf340a55a10@instructure.com>

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