hide the drive's contextmenu when you hit escape

www/common/drive-ui.js

@@ -526,6 +526,8 @@ define([
                 }
             });
         });
+
+
         return $(menu);
     };
 
@@ -919,6 +921,11 @@ define([
             if (e.ctrlKey) { ev.ctrlKey = true; }
             if (e.shiftKey) { ev.shiftKey = true; }
 
+            // ESC
+            if (e.which === 27) {
+                 return void APP.hideMenu();
+            }
+
             // Enter
             if (e.which === 13) {
                 var $allSelected = $content.find('.cp-app-drive-element.cp-app-drive-element-selected');