Allow setting tardiness for multiple people

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

@@ -223,6 +223,15 @@ export default {
           <extra-mark-buttons
             @input="handleMultipleAction('extraMark', $event)"
           />
+          <h4>{{ $t("alsijil.personal_notes.tardiness") }}</h4>
+          <tardiness-field
+            v-bind="documentationPartProps"
+            :loading="loading"
+            :disabled="loading"
+            :value="0"
+            :participations="selected"
+            @input="handleMultipleAction('tardiness', $event)"
+          />
         </div>
       </v-scroll-y-reverse-transition>
     </template>