-
No, it would be much different. Go to the Studio->Designer->Injections->Head injection area and place there the following code:
<script language="javascript">
$(document).ready(function() {
var oField = $(".bx-form-input-location-country");
$.each(['GB', 'CA', 'US'], function( iIndex, sValue ) {
oField.find("option[value='" + sValue + "']").val("---" + sValue);
});
oField.find("option:not([value^='---'])").remove();
oField.find("option").each(function(){
var sNew = $(this).val();
$(this).val(sNew.replace('---', ''));
});
});
</script>