Fix tablet appearance of login screens

lib/ui/routes/create_account_route.dart

@@ -1,6 +1,6 @@
 import 'package:comunic/ui/routes/login_route.dart';
 import 'package:comunic/ui/widgets/create_account_widget.dart';
-import 'package:comunic/ui/widgets/login_routes_theme.dart';
+import 'package:comunic/ui/widgets/login_route_container.dart';
 import 'package:comunic/utils/intl_utils.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
@@ -12,7 +12,7 @@ import 'package:flutter/material.dart';
 class CreateAccountRoute extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
-    return LoginRoutesTheme(
+    return LoginRouteContainer(
       child: Scaffold(
         appBar: AppBar(
           title: Text(tr("Create an account")),

lib/ui/routes/forgot_password_route.dart

@@ -1,7 +1,7 @@
 import 'package:comunic/helpers/account_helper.dart';
 import 'package:comunic/ui/routes/password_reset_route.dart';
 import 'package:comunic/ui/widgets/dialogs/cancel_dialog_button.dart';
-import 'package:comunic/ui/widgets/login_routes_theme.dart';
+import 'package:comunic/ui/widgets/login_route_container.dart';
 import 'package:comunic/ui/widgets/safe_state.dart';
 import 'package:comunic/utils/input_utils.dart';
 import 'package:comunic/utils/intl_utils.dart';
@@ -17,7 +17,7 @@ import 'package:flutter/rendering.dart';
 class ForgotPasswordRoute extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
-    return LoginRoutesTheme(
+    return LoginRouteContainer(
       child: Scaffold(
         appBar: AppBar(
           title: Text(tr("Password forgotten")),

lib/ui/routes/login_route.dart

@@ -1,6 +1,6 @@
 import 'package:comunic/ui/routes/forgot_password_route.dart';
 import 'package:comunic/ui/widgets/init_widget.dart';
-import 'package:comunic/ui/widgets/login_routes_theme.dart';
+import 'package:comunic/ui/widgets/login_route_container.dart';
 import 'package:comunic/ui/widgets/login_widget.dart';
 import 'package:comunic/utils/intl_utils.dart';
 import 'package:flutter/material.dart';
@@ -22,7 +22,7 @@ class _LoginRouteState extends State<LoginRoute> {
 
   @override
   Widget build(BuildContext context) {
-    return LoginRoutesTheme(
+    return LoginRouteContainer(
       child: Scaffold(
         appBar: AppBar(
           title: Text(tr("Login to Comunic")),

lib/ui/routes/password_reset_route.dart

@@ -2,7 +2,7 @@ import 'package:comunic/helpers/account_helper.dart';
 import 'package:comunic/models/res_check_password_reset_token.dart';
 import 'package:comunic/ui/dialogs/input_new_password_dialog.dart';
 import 'package:comunic/ui/widgets/async_screen_widget.dart';
-import 'package:comunic/ui/widgets/login_routes_theme.dart';
+import 'package:comunic/ui/widgets/login_route_container.dart';
 import 'package:comunic/ui/widgets/new_password_input_widget.dart';
 import 'package:comunic/ui/widgets/safe_state.dart';
 import 'package:comunic/utils/intl_utils.dart';
@@ -24,7 +24,7 @@ class PasswordResetRoute extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return LoginRoutesTheme(
+    return LoginRouteContainer(
       child: Scaffold(
         appBar: AppBar(
           title: Text(tr("Change your password")),

lib/ui/widgets/login_route_container.dart

@@ -0,0 +1,36 @@
+import 'package:comunic/models/config.dart';
+import 'package:comunic/ui/widgets/login_routes_theme.dart';
+import 'package:comunic/utils/ui_utils.dart';
+import 'package:flutter/material.dart';
+
+/// Login route container
+///
+/// Contains both theme and route centering
+///
+/// @author Pierre Hubert
+
+class LoginRouteContainer extends StatelessWidget {
+  final Widget child;
+
+  const LoginRouteContainer({Key key, @required this.child}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    if (!isTablet(context)) return LoginRoutesTheme(child: child);
+
+    return Container(
+      color: Config.get().splashBackgroundColor,
+      child: Padding(
+        padding: EdgeInsets.only(top: 10),
+        child: Center(
+          child: LoginRoutesTheme(
+            child: ConstrainedBox(
+              constraints: BoxConstraints(maxWidth: 370),
+              child: child,
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+}