Manage Submissions Button Functionalities

[lykimchee]

Resolves #1849

Description

Add functionality to majority of buttons (exceptions listed below) on the redesigned Manage Submissions interface. Exceptions are:

• Missing Submissions (should still have old functionality instead of filter, this will be added in [Manage Submissions] Missing submissions filter and note #1857)
• Change Grade Type (this button will be changed to a dropdown, details TBD, and added with [Manage Submissions] Excused/Delete Submission Popup + Change Grade Type #1855)

Also includes excused student marker (for #1855) and some commented code for the excused popup (for #1855, in-progress).

Includes a bug fix where only a certain number of table entries were shown— now the Manage Submissions table should show all submissions for an assignment.

Testing

Main

• Create Submission, Download Final Submissions, and Manage Extensions should all work as intended
• Missing Submissions should work but not in the redesigned manner

Inline

• View Submission File (in row)
• Delete Submission (in row)
• [For Autograded] Regrade Submission (in row)

Selected

• Select Submissions/All should activate the Regrade/Delete/Download Selected buttons (should originally be disabled)
• [For Autograded] Regrade multiple submissions
• Delete multiple submissions
• Download multiple submissions

(Note: Original issue mentions changing wording of "Excuse Selected"/"Unexcuse Selected" in the button. This functionality was implemented in the first commit in this PR, but was removed upon further discussion in order to have a dropdown "Change Grade Type" button instead.)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have run rubocop for style check. If you haven't, run overcommit --install && overcommit --sign to use pre-commit hook for linting
• My change requires a change to the documentation, which is located at Autolab Docs
• I have updated the documentation accordingly, included in this PR

[michellexliu]

I think all of the checkboxes should be shown as checked when the select all button is clicked

[michellexliu]

am getting this error when i try to "change grade type"