Conserta lógica para embutir SAPL em iframe (#3653)

sapl/templates/base.html

@@ -267,7 +267,7 @@
       <script type="text/javascript" >
         function inIframe () {
           try {
-              return window.self !== window.top;
+              return window.location !== window.parent.location
           } catch (e) {
               return true;
           }