feature: Deprecated authwebview and use platform browser

lib/views/auth_web_view.dart

@@ -1,54 +0,0 @@
-import 'package:adaptive_page_layout/adaptive_page_layout.dart';
-import 'package:fluffychat/components/matrix.dart';
-import 'package:flutter/foundation.dart';
-import 'package:flutter/material.dart';
-import 'package:flutter_gen/gen_l10n/l10n.dart';
-import 'package:url_launcher/url_launcher.dart';
-import 'package:webview_flutter/webview_flutter.dart';
-
-class AuthWebView extends StatefulWidget {
-  final String authType;
-  final String session;
-  final Function onAuthDone;
-
-  const AuthWebView(this.authType, this.session, this.onAuthDone);
-
-  @override
-  _AuthWebViewState createState() => _AuthWebViewState();
-}
-
-class _AuthWebViewState extends State<AuthWebView> {
-  bool _isLoading = true;
-  @override
-  Widget build(BuildContext context) {
-    final url = Matrix.of(context).client.homeserver.toString() +
-        '/_matrix/client/r0/auth/${widget.authType}/fallback/web?session=${widget.session}';
-    if (kIsWeb) launch(url);
-    return Scaffold(
-      appBar: AppBar(
-        title: Text(L10n.of(context).authentication),
-        leading: IconButton(
-          icon: Icon(Icons.close),
-          onPressed: () {
-            AdaptivePageLayout.of(context).pop();
-            widget.onAuthDone();
-          },
-        ),
-      ),
-      body: Column(
-        children: <Widget>[
-          if (_isLoading) LinearProgressIndicator(),
-          Expanded(
-            child: kIsWeb
-                ? Center(child: Icon(Icons.link_outlined))
-                : WebView(
-                    onPageFinished: (_) => setState(() => _isLoading = false),
-                    initialUrl: url,
-                    javascriptMode: JavascriptMode.unrestricted,
-                  ),
-          ),
-        ],
-      ),
-    );
-  }
-}

lib/views/sign_up_password.dart

@@ -81,12 +81,20 @@ class _SignUpPasswordState extends State<SignUpPassword> {
           );
           if (OkCancelResult.ok ==
               await showOkCancelAlertDialog(
+                message: L10n.of(context).pleaseFollowInstructionsOnWeb,
                 context: context,
+                okLabel: L10n.of(context).next,
+                cancelLabel: L10n.of(context).cancel,
               )) {
             _signUpAction(
               context,
               auth: AuthenticationData(session: exception.session),
             );
+          } else {
+            setState(() {
+              loading = false;
+              passwordError = null;
+            });
           }
           return;
         }