///<summary>Handle edit->undo command from menu</summary>
public void OnContentsActivated(object o, EventArgs args)
{
#if ENABLE_UNIX_SPECIFIC
string helpScript = FileResourcePath.GetDataPath("help_script.sh");
string helpDir = FileResourcePath.GetHelpDir();
System.Diagnostics.Process.Start(helpScript, helpDir);
#endif
}