fix autobonus (must be did not show bonus to paiment field)

lib/screens/purchase.dart

@@ -77,7 +77,9 @@ class PurchaseScreenState<T> extends BaseState<PurchaseScreen> {
     widgets.add(getInputField()); // Нельзя добавить еще одно поле таким же способом
 
     if (this.loyalityType == 'bonus') {
-      widgets.add(getBonusInputField());
+      if (this.flavor != 'autobonus') {
+        widgets.add(getBonusInputField());
+      }
     }
 
     widgets.add(wrapButton(getScreenMargins(36.0), getCompleteButton()));