updated new flutter version

lib/widgets/desktop/desktop_user_profile.dart

@@ -13,7 +13,6 @@ import '../../store/store.dart';
 import '../../utils/http_util.dart';
 import '../../utils/util_web.dart' if (dart.library.io) '../../utils/util_io.dart';
 import '../../utils/utils.dart';
-import '../../widgets/general/breadcrumbs.dart';
 
 class DesktopUserProfile extends StatefulWidget {
   final Key key;
@@ -435,7 +434,7 @@ class DesktopUserProfileState extends State<DesktopUserProfile> {
               ),
             ),
             actions: <Widget>[
-              FlatButton(
+              TextButton(
                 child: Text(
                     S.of(context).cancel
                 ),
@@ -443,7 +442,7 @@ class DesktopUserProfileState extends State<DesktopUserProfile> {
                   Navigator.of(context).pop();
                 },
               ),
-              FlatButton(
+              TextButton(
                 child: Text(
                   S.of(context).submit_to_change,
                 ),