commit #51 - styling improvements, refactoring submission view

...LecturerResponseView/lecturer-response-view.component.css

...ecturerResponseView/lecturer-response-view.component.html

.../LecturerResponseView/lecturer-response-view.component.ts

...erSubmissionsView/lecturer-submissions-view.component.css

...rSubmissionsView/lecturer-submissions-view.component.html

...rerSubmissionsView/lecturer-submissions-view.component.ts

ompp-web/src/app/LecturerComponents/lecturer-root.module.ts

...-web/src/app/LecturerComponents/lecturer-routes.module.ts