block access to the properties menu in iframes

www/common/common-ui-elements.js

@@ -888,6 +888,14 @@ define([
                 .text(Messages.propertiesButton))
                 .click(common.prepareFeedback(type))
                 .click(function () {
+                    var isTop;
+                    try {
+                        isTop = common.getMetadataMgr().getPrivateData().isTop;
+                    } catch (err) { console.error(err); }
+                    if (!isTop) {
+                        return void UIElements.openDirectlyConfirmation(common);
+                    }
+
                     sframeChan.event('EV_PROPERTIES_OPEN');
                 });
                 break;