Revert f56dc8e..d3ec80f

This rolls back to commit f56dc8ecf5.

morphic.js

@@ -10353,17 +10353,16 @@ WorldMorph.prototype.initEventListeners = function () {
         false
     );
 
-    // window.onbeforeunload = function (evt) {
-    //     var e = evt || window.event,
-    //         msg = "Are you sure you want to leave?";
-    //     // For IE and Firefox
-    //     if (e) {
-    //         e.returnValue = msg;
-    //     }
-    //     // For Safari / chrome
-    //     return msg;
-    // };
-    window.onbeforeunload = null;
+    window.onbeforeunload = function (evt) {
+        var e = evt || window.event,
+            msg = "Are you sure you want to leave?";
+        // For IE and Firefox
+        if (e) {
+            e.returnValue = msg;
+        }
+        // For Safari / chrome
+        return msg;
+    };
 };
 
 WorldMorph.prototype.mouseDownLeft = function () {

objects.js

@@ -4764,14 +4764,7 @@ StageMorph.prototype.userMenu = function () {
     menu.addItem(
         "pic...",
         function () {
-            //window.open();
-            //window.location.href = 
-            var ref = myself.fullImageClassic().toDataURL().replace(/^data:image\/[^;]/, 'data:application/octet-stream');
-            var link = document.createElement('a');
-            link.download = 'download.png';
-            link.href = ref;
-            link.click();
-            console.log("here");
+            window.open(myself.fullImageClassic().toDataURL());
         },
         'open a new window\nwith a picture of the stage'
     );