fixed subaddress label (#281)

* fixed subaddress label

* Added name length check

lib/src/screens/receive/widgets/address_cell.dart

@@ -39,7 +39,18 @@ class AddressCell extends StatelessWidget {
   final Function(String) onTap;
   final Function() onEdit;
 
-  String get label => name ?? address;
+  String get label {
+    if (name.isEmpty){
+      if(address.length<=16){
+        return address;
+      }else{
+        return address.substring(0,8)+'...'+
+            address.substring(address.length-8,address.length);
+      }
+    }else{
+      return name;
+    }
+  }
 
   @override
   Widget build(BuildContext context) {
@@ -49,7 +60,7 @@ class AddressCell extends StatelessWidget {
           color: backgroundColor,
           padding: EdgeInsets.only(left: 24, right: 24, top: 28, bottom: 28),
           child: Text(
-            name ?? address,
+            label,
             maxLines: 1,
             overflow: TextOverflow.ellipsis,
             style: TextStyle(