Change Shortcut key tooltip text

Hi, 

I'm adding a button to the toolbar with shortcut key Ctrt+Shift+S. See code bellow:

var btn = new EditActionCommand<SaveEditAction>(this, "Save")
      {
        Caption = "Save",
        TooltipText = "Saves Code",
        ShortcutKey = Key.S,
        ShortcutModifiers = ModifierKeys.Control | ModifierKeys.Shift
      }

Everything works fine and when i hoover over the button, I get a tool tip "Saves Code (Control-Shift-S)". I want to change the text for the shortcut key in the tooltip to "Saves Code (Ctrl+Shift+S)", is this possible?