Rename all the question submissions to simply "answer".
More identifier renames.
Fix creating a new submission.
Fix wrong answer type being generated.
Implement editing a submission.
Fix display of the coding questions.
Implemented finalising the submission.
Rename the submission_grading controller to mission_submission_grading to be specific.
Remove the old assessments framework models.
Implement finalising submissions.
Instead of having all the resource actions for gradings, just have a get and post handler.