Only display chips, if personal note has changes in it

aleksis/apps/alsijil/static/js/vue/components/alsijil/PersonalNotes.js

@@ -66,10 +66,12 @@ export default {
     >
       <template v-slot:activator="{ on, attrs }">
         <div>
-          <v-chip class="ma-1" v-for="personal_note in personalNotes" close
-          @click="editPersonalNote(personal_note.student.id)" @click:close="removePersonalNote(personal_note)">
-            {{personal_note.student.full_name}}: {{personal_note.tardiness}}
-          </v-chip>
+          <template v-for="personal_note in personalNotes">
+            <v-chip class="ma-1" close @click="editPersonalNote(personal_note.student.id)"
+              @click:close="removePersonalNote(personal_note.student.id)" v-if="personalNoteString(personal_note)">
+              {{ personal_note.student.full_name }}: {{ personalNoteString(personal_note) }}
+            </v-chip>
+          </template>
         </div>
         <v-btn
           class="ma-1"