CAKE-114 | applied disclaimer page when user install wallet first time; applied route to disclaimer page as initial route (main.dart); change leading widget in the disclaimer page; applied call of welcome page when user press accept button in the disclaimer page

lib/main.dart

@@ -120,7 +120,7 @@ class App extends StatelessWidget {
         settingsStore.isDarkTheme ? Brightness.light : Brightness.dark;
     final authenticationStore = getIt.get<AuthenticationStore>();
     final initialRoute = authenticationStore.state == AuthenticationState.denied
-        ? Routes.welcome
+        ? Routes.disclaimer
         : Routes.login;
 
     SystemChrome.setSystemUIOverlayStyle(SystemUiOverlayStyle(

lib/src/screens/disclaimer/disclaimer_page.dart

@@ -1,5 +1,6 @@
 import 'dart:ui';
 import 'package:cake_wallet/palette.dart';
+import 'package:cake_wallet/routes.dart';
 import 'package:cake_wallet/utils/show_pop_up.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/cupertino.dart';
@@ -19,26 +20,29 @@ class DisclaimerPage extends BasePage {
   String get title => 'Terms of Use';
 
   @override
-  Widget body(BuildContext context) => DisclaimerPageBody(isReadOnly: true);
+  Widget leading(BuildContext context) {
+    return isReadOnly ? super.leading(context) : null;
+  }
+
+  @override
+  Widget body(BuildContext context) => DisclaimerPageBody(isReadOnly: isReadOnly);
 }
 
 class DisclaimerPageBody extends StatefulWidget {
-  DisclaimerPageBody({this.isReadOnly = true});
+  DisclaimerPageBody({this.isReadOnly});
 
   final bool isReadOnly;
 
   @override
-  DisclaimerBodyState createState() => DisclaimerBodyState(false);
+  DisclaimerBodyState createState() => DisclaimerBodyState();
 }
 
 class DisclaimerBodyState extends State<DisclaimerPageBody> {
-  DisclaimerBodyState(this._isAccepted);
 
   static const xmrtoUrl = 'https://xmr.to/terms-of-service';
   static const changenowUrl = 'https://changenow.io/terms-of-use';
   static const morphUrl = 'http://morphtoken.com/terms';
 
-  final bool _isAccepted;
   bool _checked = false;
   String _fileText = '';
 
@@ -70,7 +74,7 @@ class DisclaimerBodyState extends State<DisclaimerPageBody> {
   void initState() {
     super.initState();
     getFileLines();
-    if (_isAccepted) WidgetsBinding.instance.addPostFrameCallback(_afterLayout);
+    if (!widget.isReadOnly) WidgetsBinding.instance.addPostFrameCallback(_afterLayout);
   }
 
   @override
@@ -87,8 +91,7 @@ class DisclaimerBodyState extends State<DisclaimerPageBody> {
                     padding: EdgeInsets.only(left: 24.0, right: 24.0),
                     child: Column(
                       children: <Widget>[
-                        !_isAccepted
-                        ? Row(
+                        Row(
                           children: <Widget>[
                             Expanded(
                               child: Text(
@@ -102,13 +105,10 @@ class DisclaimerBodyState extends State<DisclaimerPageBody> {
                               ),
                             )
                           ],
-                        )
-                        : Offstage(),
-                        !_isAccepted
-                        ? SizedBox(
+                        ),
+                        SizedBox(
                           height: 20.0,
-                        )
-                        : Offstage(),
+                        ),
                         Row(
                           children: <Widget>[
                             Expanded(
@@ -254,8 +254,7 @@ class DisclaimerBodyState extends State<DisclaimerPageBody> {
                 ],
               )),
           if (!widget.isReadOnly) ...[
-            !_isAccepted
-            ? Row(
+            Row(
               children: <Widget>[
                 Expanded(
                   child: Container(
@@ -303,25 +302,19 @@ class DisclaimerBodyState extends State<DisclaimerPageBody> {
                       )),
                 ),
               ],
-            )
-            : Offstage(),
-            !_isAccepted
-            ? Container(
+            ),
+            Container(
               padding:
               EdgeInsets.only(left: 24.0, right: 24.0, bottom: 24.0),
               child: PrimaryButton(
-                onPressed: _checked ? () {} : null,
+                onPressed: _checked ? () =>
+                Navigator.of(context).popAndPushNamed(Routes.welcome)
+                : null,
                 text: 'Accept',
                 color: Colors.green,
                 textColor: Colors.white,
               ),
-            )
-            : Offstage(),
-            _isAccepted
-            ? SizedBox(
-              height: 24.0,
-            )
-            : Offstage()
+            ),
           ],
         ],
       ),

lib/view_model/settings/settings_view_model.dart

@@ -144,7 +144,7 @@ abstract class SettingsViewModelBase with Store {
         RegularListItem(
           title: S.current.settings_terms_and_conditions,
           handler: (BuildContext context) =>
-              Navigator.of(context).pushNamed(Routes.disclaimer),
+              Navigator.of(context).pushNamed(Routes.readDisclaimer),
         ),
         RegularListItem(
           title: S.current.faq,