Simplify calculation of tardy people

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

@@ -12,6 +12,7 @@ import SlideIterator from "aleksis.core/components/generic/SlideIterator.vue";
 import PersonalNotes from "../personal_notes/PersonalNotes.vue";
 import ExtraMarkChip from "../../extra_marks/ExtraMarkChip.vue";
 import TardinessChip from "./TardinessChip.vue";
+import TardinessField from "./TardinessField.vue";
 
 export default {
   name: "ManageStudentsDialog",

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

@@ -157,7 +157,7 @@ export default {
      */
     tardyParticipations() {
       return this.documentation.participations.filter(
-        (p) => p.noteWithTardiness != null && p.noteWithTardiness.tardiness > 0,
+        (p) => p.tardiness,
       );
     },
   },