Fix styling regressions from sdk upgrade

lib/branding.dart

 import 'package:flutter/material.dart';
 
 const appName = 'onTime';
-// final scheme = ColorScheme.fromSwatch(primarySwatch: Colors.blue);
 final scheme = ColorScheme.fromSeed(seedColor: Colors.pink);
 const passedTimeOverlayColor = Colors.black26;
 

lib/timetable/lesson.dart

 import 'package:flutter/material.dart';
 
 import '../context.dart';
-import '../util/simultaneous.dart';
 import '../untis/lesson.dart';
+import '../util/simultaneous.dart';
 import 'lesson_dialog.dart';
 import 'lesson_label.dart';
 
@@ -60,6 +60,7 @@ class LessonWidget extends StatelessWidget {
                     horizontal: 4,
                     vertical: 8,
                   ),
+                  alignment: Alignment.center,
                   child: LessonLabel(lesson: lesson),
                 ),
               ),

lib/timetable/lesson_label.dart

@@ -19,13 +19,8 @@ class LessonLabel extends StatelessWidget {
             text: room,
             style: const TextStyle(fontWeight: FontWeight.bold),
           ),
-          const TextSpan(text: '\n\n'),
-          WidgetSpan(
-              child: Text(
-            lecture.substring(0, lecture.length - 5),
-            style: const TextStyle(overflow: TextOverflow.ellipsis),
-          )),
-          TextSpan(text: lecture.substring(lecture.length - 5)),
+          const TextSpan(text: '\n'),
+          TextSpan(text: lecture),
         ],
         style: Theme.of(context).primaryTextTheme.bodySmall!,
       ),

lib/timetable/timetable.dart

@@ -98,30 +98,27 @@ class _TimetableState extends State<Timetable> {
                   : ScrollDecelerationRate.fast,
             ),
             children: [
-              Padding(
-                padding: const EdgeInsets.symmetric(vertical: 16),
-                child: Stack(
-                  children: [
-                    ...Period.defaultPeriods.map(
-                      (period) => PeriodBackground(period),
-                    ),
-                    Row(
-                      crossAxisAlignment: CrossAxisAlignment.start,
-                      children: List.generate(Timetable.weekdayCount, (index) {
-                        final lessons = getMergedLessonsOfDay(index);
-                        final date = getDateAtWeekdayIndex(index);
-
-                        return Expanded(
-                          child: WeekdayContent(
-                            date: date,
-                            lessons: lessons,
-                            appContext: widget.appContext,
-                          ),
-                        );
-                      }),
-                    ),
-                  ],
-                ),
+              Stack(
+                children: [
+                  ...Period.defaultPeriods.map(
+                    (period) => PeriodBackground(period),
+                  ),
+                  Row(
+                    crossAxisAlignment: CrossAxisAlignment.start,
+                    children: List.generate(Timetable.weekdayCount, (index) {
+                      final lessons = getMergedLessonsOfDay(index);
+                      final date = getDateAtWeekdayIndex(index);
+
+                      return Expanded(
+                        child: WeekdayContent(
+                          date: date,
+                          lessons: lessons,
+                          appContext: widget.appContext,
+                        ),
+                      );
+                    }),
+                  ),
+                ],
               ),
             ],
           ),