private void AddManualFilter()
{
var dc = this.DataContext as DirectoryViewModel;
dc.ManualFilter(manualFilter.Text, false);
manualFilter.Text = "";
manualFilter.ClearValue(AutoCompleteBox.TextProperty);
}
protected void ConfirmPressHappened(AutoCompleteBox sender)
{
AddTag(sender.DataContext as DirectoryItem, sender.Text);
sender.Text = "";
sender.ClearValue(AutoCompleteBox.TextProperty);
}