Revert changes to functionality, implement request header

...ava/edu/ntnu/idatt2105/controller/QuestionController.java

...backend/main/java/edu/ntnu/idatt2105/dto/QuestionDTO.java

...main/java/edu/ntnu/idatt2105/service/QuestionService.java

.../java/edu/ntnu/idatt2105/service/QuestionServiceTest.java

FullstackProsjekt/src/frontend/src/api.js

FullstackProsjekt/src/frontend/src/assets/axios.js

.../src/frontend/src/components/shared/EditQuestionModel.vue

...t/src/frontend/src/components/shared/NewQuestionModel.vue

...sjekt/src/frontend/src/components/shared/QuestionCard.vue

...ontend/src/components/shared/create-quiz/EditQuizView.vue

...stackProsjekt/src/frontend/src/views/OverviewQuizView.vue