Changes for buy page for bitcoin and litecoin. Added listeners for notifications from resume and launch.

lib/src/screens/buy/pre_order_page.dart

@@ -73,9 +73,7 @@ class PreOrderPage extends BasePage {
   @override
   Widget trailing(context) => TrailButton(
       caption: S.of(context).clear,
-      onPressed: () {
-        buyViewModel.reset();
-      });
+      onPressed: () => buyViewModel.reset());
 
   @override
   Widget body(BuildContext context) {

lib/src/screens/dashboard/dashboard_page.dart

@@ -180,10 +180,7 @@ class DashboardPage extends BasePage {
     final walletType = walletViewModel.type;
 
     switch (walletType) {
-      case WalletType.bitcoin:
-        Navigator.of(context).pushNamed(Routes.preOrder);
-        break;
-      default:
+      case WalletType.monero:
         await showPopUp<void>(
             context: context,
             builder: (BuildContext context) {
@@ -194,6 +191,9 @@ class DashboardPage extends BasePage {
                   buttonAction: () => Navigator.of(context).pop());
             });
         break;
+      default:
+        Navigator.of(context).pushNamed(Routes.preOrder);
+        break;
     }
   }
 }