Fixed Nonsecure warning on https from Addthis template

[Andy.N]

In addthis_ajax template, images will load from Addthis http links instead of https, resulting in non-secure warning.
XenForo.loadJs("http://s7.addthis.com/js/250/addthis_widget.js#domready=1{xen:if {$xenOptions.addThisPubId}, '&pubid={xen:jsescape $xenOptions.addThis.pubId}'}");

We can changes to https or //

 

[Mike]

Shifted it to just //.

 

[rdn]

also twitter widget, using http.