Removed swipe back on preseed and seed screens for new wallet.

lib/src/screens/seed/pre_seed_page.dart

@@ -22,7 +22,9 @@ class PreSeedPage extends BasePage {
     final image =
         getIt.get<SettingsStore>().isDarkTheme ? imageDark : imageLight;
 
-    return Container(
+    return WillPopScope(
+        onWillPop: () async => false,
+        child: Container(
           padding: EdgeInsets.all(24),
           child: Column(
             children: [
@@ -37,8 +39,7 @@ class PreSeedPage extends BasePage {
                     mainAxisAlignment: MainAxisAlignment.spaceBetween,
                     children: [
                       Padding(
-                    padding:
-                    EdgeInsets.only(top: 70, left: 16, right: 16),
+                        padding: EdgeInsets.only(top: 70, left: 16, right: 16),
                         child: Text(
                           S.of(context).pre_seed_description,
                           textAlign: TextAlign.center,
@@ -52,21 +53,15 @@ class PreSeedPage extends BasePage {
                         ),
                       ),
                       PrimaryButton(
-                      onPressed: () =>
-                          Navigator.of(context).popAndPushNamed(Routes.seed,
-                              arguments: true),
+                          onPressed: () => Navigator.of(context)
+                              .popAndPushNamed(Routes.seed, arguments: true),
                           text: S.of(context).pre_seed_button_text,
-                      color: Theme.of(context)
-                          .accentTextTheme
-                          .body2
-                          .color,
+                          color: Theme.of(context).accentTextTheme.body2.color,
                           textColor: Colors.white)
                     ],
-              )
-          )
+                  ))
             ],
           ),
-    );
+        ));
   }
-
 }

lib/src/screens/seed/wallet_seed_page.dart

@@ -86,7 +86,7 @@ class WalletSeedPage extends BasePage {
     final image =
         getIt.get<SettingsStore>().isDarkTheme ? imageDark : imageLight;
 
-    return Container(
+    return WillPopScope(onWillPop: () async => false, child:  Container(
         padding: EdgeInsets.all(24),
         child: Column(
           children: <Widget>[
@@ -194,6 +194,6 @@ class WalletSeedPage extends BasePage {
                   ],
                 ))
           ],
-        ));
+        )));
   }
 }