CWA-210 | added estimated fee row and clear button to the send page; removed validation from cryptocurrency textfield in the send template page; changed call send template page in the router; fix "clear" in polish

lib/src/stores/send/send_store.dart

@@ -45,6 +45,9 @@ abstract class SendStoreBase with Store {
   @observable
   String cryptoAmount;
 
+  @observable
+  String address;
+
   @observable
   bool isValid;
 
@@ -157,6 +160,18 @@ abstract class SendStoreBase with Store {
     }
   }
 
+  @action
+  void changeAddress(String address) {
+    this.address = address;
+  }
+
+  @action
+  void clear() {
+    address = '';
+    cryptoAmount = '';
+    fiatAmount = '';
+  }
+
   Future<bool> isOpenaliasRecord(String name) async {
     final _openaliasRecord = await OpenaliasRecord
         .fetchAddressAndName(OpenaliasRecord.formatDomainName(name));