chore: Make app ready for flutter 1 22

lib/components/list_items/participant_list_item.dart

@@ -71,7 +71,9 @@ class ParticipantListItem extends StatelessWidget {
     };
     final permissionBatch = user.powerLevel == 100
         ? L10n.of(context).admin
-        : user.powerLevel >= 50 ? L10n.of(context).moderator : '';
+        : user.powerLevel >= 50
+            ? L10n.of(context).moderator
+            : '';
     var items = <PopupMenuEntry<String>>[];
 
     if (user.id != Matrix.of(context).client.userID) {

lib/components/theme_switcher.dart

@@ -114,7 +114,9 @@ final ThemeData amoledTheme = ThemeData.dark().copyWith(
 
 Color chatListItemColor(BuildContext context, bool activeChat) =>
     Theme.of(context).brightness == Brightness.light
-        ? activeChat ? Color(0xFFE8E8E8) : Colors.white
+        ? activeChat
+            ? Color(0xFFE8E8E8)
+            : Colors.white
         : activeChat
             ? ThemeSwitcherWidget.of(context).amoledEnabled
                 ? Color(0xff121212)