Missing test coverage in staff/views.py

[niklasmohrin]

The coverage in staff/views.py is rather low, here are some spots that seem important-ish

• semester_grade_reminder
• semester_archive_{participants, results}, semester_delete_grade_documents, {evaluation, course}_delete: these just forward to the methods on the database objects / instances; I suppose these are tested then, right?
• course_create with semester.participations_are_archived
• evaluation_edit with evaluation.is_single_resultand helper_single_result_edit itself
• we never evaluation.reopen_evaluation() or evaluation.manager_approve() within evaluation_edit
• get_evaluation_and_contributor_textanswer_sections with filter_textanswers or with general contributions or the cases where no answers exist (not sure if these are even possible)
• questionnaire_index with filter_questionnaires
• make_questionnaire_edit_forms with editable
• questionnaire_edit where the form and formset are valid
• user_index with filter_users
• export_contributor_results_view