click on close cancell stick

IPython/frontend/html/notebook/static/js/codecell.js

@@ -92,6 +92,9 b' var IPython = (function (IPython) {'
             } else {
                 return true; 
             };
+        } else if (event.which === key.ESC) {
+            IPython.tooltip.remove_and_cancel_tooltip(true);
+            return true;
         } else if (event.which === key.DOWNARROW && event.type === 'keydown') {
             // If we are not at the bottom, let CM handle the down arrow and
             // prevent the global keydown handler from handling it.

IPython/frontend/html/notebook/static/js/tooltip.js

@@ -168,6 +168,7 b' var IPython = (function (IPython) {'
         // as in the completer, because it is not focusable, so won't
         // get the event.
         if (this._sticky == false || force == true) {
+            this.cancel_stick();
             this._hide();
         }
         this.cancel_pending();