Morphic: Prevent default action for ctrl-/cmd-key events

… and allow using these for Snap! without having Chrome trigger its own
actions for them

history.txt

@@ -2125,3 +2125,7 @@ ______
 ------
 * error message when trying to import a non-text file into a variable, thanks, Nate!
 * fixed #407 (custom-block coloring w/ zebra off)
+
+140520
+------
+* Morphic: Prevent default action for ctrl-/cmd-key events

morphic.js

@@ -1035,7 +1035,7 @@
 /*global window, HTMLCanvasElement, getMinimumFontHeight, FileReader, Audio,
 FileList, getBlurredShadowSupport*/
 
-var morphicVersion = '2014-February-03';
+var morphicVersion = '2014-April-20';
 var modules = {}; // keep track of additional loaded modules
 var useBlurredShadows = getBlurredShadowSupport(); // check for Chrome-bug
 
@@ -10268,6 +10268,9 @@ WorldMorph.prototype.initEventListeners = function () {
                 }
                 event.preventDefault();
             }
+            if (event.ctrlKey || event.metaKey) {
+                event.preventDefault();
+            }
         },
         false
     );