Custom view (#59)

* expose custom-view to service-info api

* expose custom-view to service-info api

* Most horrible commit in history: pdf downloader + necessary fixes in shared modules and dep updates

* include a subset of the newest version of shared modules from mother ship repo

* fix system tests and translations work

* real data in custom view

* check for undefined user_answers

* try to fix undefined answers error

src/components/PdfDownload/PdfGenerator.tsx

@@ -292,9 +292,9 @@ const MyDoc: React.FC<React.PropsWithChildren<CustomViewIframeState>> = (props)
     .flatMap((exercise) => {
       return exercise.exercise_tasks.flatMap((task) => {
         const grading = task.grading as CustomViewExerciseTaskGrading
-        const answer = task.user_answer
-          ? ((task.user_answer as CustomViewExerciseTaskSubmission[])[0].data_json as UserAnswer)
-          : null
+        const answer =
+          ((task.user_answer as CustomViewExerciseTaskSubmission)?.data_json as UserAnswer) ?? null
+
         const pubSpec = task.public_spec as PublicSpec
         const gradingFeedback = grading.feedback_json
           ? (grading.feedback_json as ExerciseFeedback)