Be more explicit about template location.

cms/templates/unit.html

@@ -58,7 +58,9 @@
                   % if type == 'advanced' or len(templates) > 1:
                     <a href="#" class="multiple-templates" data-type="${type}">
                   % else:
-                    <a href="#" class="single-template" data-type="${type}" data-location="${templates[0][1]}">
+                    % for _, location, _ in templates:
+                    <a href="#" class="single-template" data-type="${type}" data-location="${location}">
+                    % endfor
                   % endif
                       <span class="large-template-icon large-${type}-icon"></span>
                       <span class="name">${type}</span>