Released remark result has incorrect icon on grades table under Marking State

[alyshakwok]

Steps to reproduce:

1. From a student's login view with a result, submit a remark request
2. Login to teacher's view, fill in marking rubric
3. Set status to complete
4. Release result from the submission marking page
5. Navigate to grades table
6. Observe the marking state icon for the corresponding group's submissions

Expected: Should be the "Released" icon (hover on icon to reveal what type of icon it is)
Actual: "Completed" icon is shown

Note: If you then select that group's row and click "Release Marks" (even though result is already technically released), it will update the icon to the correct image. If you then select the group's row again and click "Unrelease Marks", icon will change back to "Completed" but result will still be released.

Possibly related to issue #1018.