GridFieldOrderableRows issue when data class is Versioned and relation is has_many.

[priyashantha]

When the data class is Versioned and you re-order the records and publish it doesn't update the _Live table but only the stage table.

This happens because the condition in this line https://github.com/symbiote/silverstripe-gridfieldextensions/blob/master/src/GridFieldOrderableRows.php#L509 won't be true when the $table_name config is defined in the class. $class is FQN but $this->getSortTable($list) is just the table name.

[priyashantha]

Fix added in PR #243

[dhensby]

fixed with #243