GymMode: Use Table of Contents icon, not Menu

Author: Miroslav Mazel

lib/widgets/workouts/gym_mode.dart

@@ -1130,7 +1130,7 @@ class NavigationHeader extends StatelessWidget {
           ),
         ),
         IconButton(
-          icon: const Icon(Icons.menu),
+          icon: const Icon(Icons.toc),
           onPressed: () {
             showDialog(
               context: context,

test/workout/gym_mode_screen_test.dart

@@ -90,7 +90,7 @@ void main() {
     expect(find.text('Bench press'), findsOneWidget);
     expect(find.text('Side raises'), findsOneWidget);
     expect(find.byIcon(Icons.close), findsOneWidget);
-    expect(find.byIcon(Icons.menu), findsOneWidget);
+    expect(find.byIcon(Icons.toc), findsOneWidget);
     expect(find.byIcon(Icons.chevron_left), findsNothing);
     expect(find.byIcon(Icons.chevron_right), findsOneWidget);
     await tester.tap(find.byIcon(Icons.chevron_right));
@@ -102,7 +102,7 @@ void main() {
     expect(find.text('Bench press'), findsOneWidget);
     expect(find.byType(ExerciseOverview), findsOneWidget);
     expect(find.byIcon(Icons.close), findsOneWidget);
-    expect(find.byIcon(Icons.menu), findsOneWidget);
+    expect(find.byIcon(Icons.toc), findsOneWidget);
     expect(find.byIcon(Icons.chevron_left), findsOneWidget);
     expect(find.byIcon(Icons.chevron_right), findsOneWidget);
     await tester.drag(find.byType(ExerciseOverview), const Offset(-500.0, 0.0));
@@ -119,7 +119,7 @@ void main() {
     expect(find.text('12 × 10 kg  (2 RiR)'), findsOneWidget);
     expect(find.text('Make sure to warm up'), findsOneWidget, reason: 'Set comment');
     expect(find.byIcon(Icons.close), findsOneWidget);
-    expect(find.byIcon(Icons.menu), findsOneWidget);
+    expect(find.byIcon(Icons.toc), findsOneWidget);
     expect(find.byIcon(Icons.chevron_left), findsOneWidget);
     expect(find.byIcon(Icons.chevron_right), findsOneWidget);
 
@@ -145,7 +145,7 @@ void main() {
     expect(find.text('Pause'), findsOneWidget);
     expect(find.byType(TimerWidget), findsOneWidget);
     expect(find.byIcon(Icons.close), findsOneWidget);
-    expect(find.byIcon(Icons.menu), findsOneWidget);
+    expect(find.byIcon(Icons.toc), findsOneWidget);
     expect(find.byIcon(Icons.chevron_left), findsOneWidget);
     expect(find.byIcon(Icons.chevron_right), findsOneWidget);
     await tester.tap(find.byIcon(Icons.chevron_right));