new url option switch: &noExitWarning

to better support embedding Snaplets into Moocs

gui.js

@@ -72,7 +72,7 @@ isRetinaSupported, SliderMorph, Animation*/
 
 // Global stuff ////////////////////////////////////////////////////////
 
-modules.gui = '2016-December-09';
+modules.gui = '2016-December-19';
 
 // Declarations
 
@@ -407,7 +407,10 @@ IDE_Morph.prototype.openIn = function (world) {
 
                             if (dict.hideControls) {
                                 myself.controlBar.hide();
-                                window.onbeforeunload = function () {nop(); };
+                                window.onbeforeunload = nop;
+                            }
+                            if (dict.noExitWarning) {
+                                window.onbeforeunload = nop;
                             }
                         }
                     ]);

history.txt

@@ -3193,6 +3193,10 @@ http://snap.berkeley.edu/run#cloud:Username=jens&ProjectName=rotation
 ------
 * Catalan translation update, thanks, @jguille2 !
 
+161219
+------
+* GUI: new url-switch: &noExitWarning
+
 
 == v4.10 === (in development)
 
@@ -3203,10 +3207,11 @@ Features:
 * basic typography support for custom block labels, thanks, Bernat!!
 * Treat JS-function reporters the same as variable getters wrt rings
 * new url switch #dl: for downloading raw shared projects
+* new url option switch: &noExitWarning
 * svg support for images from the web (svg files have been supported for a long time)
 * use media dialog for browsing and importing sounds
 
 Fixes:
 * Music (play note) to work again in new and recent browser versions (Chrome 55)
 * IDE layout: fixed resizing issues when the window becomes too small
-* Translation updates (Russian, Polish, Danish, Portuguese, Catalan)
+* Translation updates (Russian, Polish, Danish, Portuguese, Catalan, German)