Fix english absence error + comment bugreports

filcnaplo_mobile_ui/lib/common/widgets/absence/absence_view.dart

@@ -127,7 +127,7 @@ class AbsenceView extends StatelessWidget {
                   maxLines: 2,
                   overflow: TextOverflow.ellipsis,
                 ),
-                onPressed: () {
+                onPressed: () { // https://discord.com/channels/1111649116020285532/1149964760130002945
                   Navigator.of(context).pop();
 
                   if (outsideContext != null) {

filcnaplo_mobile_ui/lib/common/widgets/lesson/changed_lesson_tile.dart

@@ -57,7 +57,7 @@ class ChangedLessonTile extends StatelessWidget {
             ),
           ),
           title: Text(
-            lesson.substituteTeacher?.name != ""
+            lesson.substituteTeacher?.name != "" || lesson.substituteTeacher?.name != null
                 ? "substituted".i18n
                 : "cancelled".i18n,
             maxLines: 2,