void LoadHandler()
{
_handler.Load(this.txtSettingsPath.Text);
this.cmbMenuCommands.DataSource = _handler.AvailableMenuCommands;
this.cmbMenuShortcutValues.DataSource = Enum.GetNames(typeof(Shortcut));
cmbMenuCommands_SelectedIndexChanged(null, null);
//cmbFilterCommands_SelectedIndexChanged(null, null);
this.cmbFilterCommands.DataSource = _handler.AvailableKeyComboCommands;
}