Design UI for viewing and adding relations
With this issue we will design the UI to handle different relations for feedback, in order to have parent-child relations.
The parent child relation will have the following property:
- If a child is selected, it's parent will automatically also be selected.
With this new feature, it is important that in the UI, the grader can see what feedback options are parents/children. The grader must be able to conveniently add children to a feedback option, as well as add a feedback option on the top-level.