Attempting to release a partial submission with a remark will display notification that update was successful even though it wasn't.

[alyshakwok]

Steps to reproduce:

1. (from student) request a remark
2. (from teacher) navigate to grades table
3. select group that has a remark request
4. click "Release Marks" button

Expected:

• display a notification that there is an error because marking state is not complete
  Actual:
• displays successfully updated (even though it is not actually released, and marking state remains as partial)

[m-wu]

Related to #1018, i.e. the buttons try to release the original result. But the notification after trying to release an already released result should be changed from "Successfully updated 1 results" (since nothing was actually updated for this result).

[alyshakwok]

Using original result instead of remark if exists is related to issue #1027