public FormulaKeyboard()
{
InitializeComponent();
ShowMain();
DecimalSeparator = ServiceLocator.CultureService.GetCulture().NumberFormat.NumberDecimalSeparator;
Messenger.Default.Register<FormulaEvaluationResult>(this, ViewModelMessagingToken.FormulaEvaluated, FormulaChangedMessageAction);
this.CheckSensorKeys();
}