Fix remaining pages

...java/nl/tudelft/submit/security/AuthorizationService.java

src/main/resources/messages.properties

src/main/resources/templates/assignment/statistics.html

...main/resources/templates/assignment/statistics_table.html

src/main/resources/templates/assignment/submissions.html

src/main/resources/templates/assignment/teacher_view.html

src/main/resources/templates/edition/staff.html

src/main/resources/templates/edition/statistics.html

src/main/resources/templates/edition/statistics_table.html

src/main/resources/templates/edition/students.html

src/main/resources/templates/error/error.html

src/main/resources/templates/error/no_permission.html

src/main/resources/templates/group/create.html

src/main/resources/templates/group/student_view.html

src/main/resources/templates/group/teacher_view.html

src/main/resources/templates/group/view.html

src/main/resources/templates/module/edit.html

src/main/resources/templates/module/statistics.html

src/main/resources/templates/module/statistics_table.html

src/main/resources/templates/module/view.html