Chrome Apps Page: Fixed issue with app focusing and context.

ui/webui/resources/js/cr/ui/context_menu_handler.js

Index: ui/webui/resources/js/cr/ui/context_menu_handler.js
diff --git a/ui/webui/resources/js/cr/ui/context_menu_handler.js b/ui/webui/resources/js/cr/ui/context_menu_handler.js
index 10cb77c69ab0331196d81ca89ce1ef3d7bcc8620..0c9bb7ad9d17040d4ce42d0f288364f6ff1454a7 100644
--- a/ui/webui/resources/js/cr/ui/context_menu_handler.js
+++ b/ui/webui/resources/js/cr/ui/context_menu_handler.js
@@ -152,8 +152,13 @@ cr.define('cr.ui', function() {
 
       switch (e.type) {
         case 'mousedown':
-          if (!this.menu.contains(e.target))
+          if (!this.menu.contains(e.target)) {
             this.hideMenu();
+            if(e.button == 0 /* Left click */) {
+              e.preventDefault();
+              e.stopPropagation();
+            }
+          }
           else
             e.preventDefault();
           break;