Fix critical frontend bug introduced by 96a5d818
Bug was that the category page attempted to access .list of a BICourseDict because I forgot to change that when modifying the return value of the useBICourses hook from BICourseList to BICourseDict.
Bug was that the category page attempted to access .list of a BICourseDict because I forgot to change that when modifying the return value of the useBICourses hook from BICourseList to BICourseDict.