Sorry for the delay answer, I have modified following in your website:
1) edit your filter form as this:
<td>Property Types[wpv-control taxonomy="propertytype" type="select" url_param="proptype"]</td>
To:
<td class="propertytype">Property Types[wpv-control taxonomy="propertytype" type="select" url_param="proptype"]</td>
2) edit the js as this:
jQuery(document).ready(function($) {
$('td.propertytype select option:first').text('All');
});
Please check if the result page is it what you want. thanks