Load subjects once for the entire coursebook

aleksis/apps/alsijil/frontend/components/coursebook/documentation/DocumentationModal.vue

@@ -10,6 +10,7 @@
         :dialog-activator="activator"
         :extra-marks="extraMarks"
         :absence-reasons="absenceReasons"
+        :subjects="subjects"
       />
     </template>
     <!-- dialog view -> deactivate dialog -->
@@ -18,6 +19,7 @@
       v-bind="$attrs"
       :extra-marks="extraMarks"
       :absence-reasons="absenceReasons"
+      :subjects="subjects"
       @close="popup = false"
     />
   </mobile-fullscreen-dialog>
@@ -47,6 +49,10 @@ export default {
       type: Array,
       required: true,
     },
+    subjects: {
+      type: Array,
+      required: true,
+    },
   },
 };
 </script>