Merge pull request #6431 from jhamrick/input_ui_focus

Register input with keyboard manager

IPython/html/static/notebook/js/celltoolbar.js

@@ -376,6 +376,7 b' define(['
                 setter(cell, text.val());
             });
             button_container.append($('<span/>').append(lbl));
+            IPython.keyboard_manager.register_events(text);
         };
     };