[Bugfix:InstructorUI] date shortcut button - no ta grading (#5933)
[Bugfix:InstructorUI] date shortcut button - no ta grading (#5933)

* fix non-TA gradeable button

* added test case

* Revert "added test case"

This reverts commit fe3625dc01bf1b4cb9692433e18a5217c7e9b65b.

* fix linting error (:
Submitty/Submitty,RCOS-Grading-Server/HWserver,RCOS-Grading-Server/HWserver,RCOS-Grading-Server/HWserver,RCOS-Grading-Server/HWserver,Submitty/Submitty,Submitty/Submitty,Submitty/Submitty,Submitty/Submitty,RCOS-Grading-Server/HWserver,RCOS-Grading-Server/HWserver,Submitty/Submitty,Submitty/Submitty,Submitty/Submitty,RCOS-Grading-Server/HWserver,RCOS-Grading-Server/HWserver,Submitty/Submitty,RCOS-Grading-Server/HWserver