Resolve "Opening participations dialog in coursebook still does additionial GraphQL queries"

Closes #334 (closed)

aleksis/apps/alsijil/frontend/components/coursebook/absences/ManageStudentsDialog.vue

@@ -351,6 +351,7 @@ export default {
           />
           <h4>{{ $t("alsijil.extra_marks.title_plural") }}</h4>
           <extra-mark-buttons
+            :custom-extra-marks="extraMarks"
             @input="handleMultipleAction('extraMark', $event)"
           />
           <h4>{{ $t("alsijil.personal_notes.tardiness") }}</h4>