hide picker after the country is set

lib/entities/country.dart

@@ -376,6 +376,10 @@ class Country extends EnumerableItem<String> with Serializable<String> {
     return _all.values.firstWhereOrNull((element) => element.raw == countryCode.toLowerCase());
   }
 
+  static Country? fromFullName(String fullName) {
+    return _all.values.firstWhereOrNull((element) => element.fullName == fullName);
+  }
+
   @override
   bool operator ==(Object other) => other is Country && other.raw == raw;
 

lib/src/screens/cake_pay/cards/cake_pay_cards_page.dart

@@ -119,6 +119,8 @@ class CakePayCardsPage extends BasePage {
             _cardsListViewModel.getVendors();
           }
         },
+        child: Padding(
+          padding: const EdgeInsets.only(left: 5),
           child: Container(
             padding: EdgeInsets.symmetric(horizontal: 6),
             decoration: BoxDecoration(
@@ -153,6 +155,7 @@ class CakePayCardsPage extends BasePage {
             ),
           ),
         ),
+      ),
     );
 
     return Padding(
@@ -169,7 +172,7 @@ class CakePayCardsPage extends BasePage {
                 )),
                 SizedBox(width: 5),
                 filterButton,
-                SizedBox(width: 5),
+                if (_cardsListViewModel.showCountryPicker)
                 _countryPicker
               ])),
           SizedBox(height: 8),

lib/view_model/cake_pay/cake_pay_cards_list_view_model.dart

@@ -5,6 +5,7 @@ import 'package:cake_wallet/entities/country.dart';
 import 'package:cake_wallet/entities/fiat_currency.dart';
 import 'package:cake_wallet/generated/i18n.dart';
 import 'package:cake_wallet/store/settings_store.dart';
+import 'package:cake_wallet/view_model/dashboard/dropdown_filter_item.dart';
 import 'package:cake_wallet/view_model/dashboard/filter_item.dart';
 import 'package:mobx/mobx.dart';
 
@@ -70,6 +71,14 @@ abstract class CakePayCardsListViewModelBase with Store {
               caption: S.current.custom_value,
               onChanged: toggleCustomValueCards),
         ],
+    S.current.countries: [
+      DropdownFilterItem(
+        items: availableCountries.map((e) => e.title).toList(),
+        caption: '',
+        selectedItem: selectedCountry.title,
+        onItemSelected: (String value) => setSelectedCountry(Country.fromFullName(value)!),
+      ),
+    ]
       };
 
   String searchString;
@@ -121,6 +130,8 @@ abstract class CakePayCardsListViewModelBase with Store {
   Country get selectedCountry =>
       settingsStore.selectedCakePayCountry ?? _getInitialCountry(settingsStore.fiatCurrency);
 
+  bool get showCountryPicker => settingsStore.selectedCakePayCountry == null;
+
   bool get hasFiltersChanged =>
       settingsStore.selectedCakePayCountry != _initialSelectedCountry ||
       displayPrepaidCards != _initialDisplayPrepaidCards ||