Fix mobile design of absence cards

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

@@ -100,9 +100,8 @@ export default {
 .participation-list {
   grid-column-start: 1;
   grid-column-end: span 3;
-  grid-row-start: 2;
 }
-.vertical {
-  grid-template-columns: 1fr;
+.vertical > * {
+  grid-column-end: span 3;
 }
 </style>