removing keyboard shortcuts should also update help

IPython/html/static/base/js/keyboard.js

@@ -195,16 +195,22 b' IPython.keyboard = (function (IPython) {'
 
     ShortcutManager.prototype.add_shortcuts = function (data) {
         for (var shortcut in data) {
-            this.add_shortcut(shortcut, data[shortcut], True);
+            this.add_shortcut(shortcut, data[shortcut], true);
         }
         // update the keyboard shortcuts notebook help
         IPython.quick_help = new IPython.QuickHelp();
     }
 
-    ShortcutManager.prototype.remove_shortcut = function (shortcut) {
+    ShortcutManager.prototype.remove_shortcut = function (shortcut, suppress_help_update) {
         shortcut = normalize_shortcut(shortcut);
         delete this._counts[shortcut];
         delete this._shortcuts[shortcut];
+        // update the keyboard shortcuts notebook help
+        IPython.quick_help = new IPython.QuickHelp();
+        if (!suppress_help_update) {
+            // update the keyboard shortcuts notebook help
+            IPython.quick_help = new IPython.QuickHelp();
+        }
     }
 
     ShortcutManager.prototype.count_handler = function (shortcut, event, data) {