private async void Entry_Focused(object sender, FocusEventArgs e)
{
//prevents the keyboard from opening when calling the modal
Make.Unfocus();
var mainViewModel = MainViewModel.GetInstance();
Fabricantes = mainViewModel.Filtros.Fabricantes;
mainViewModel.FabricantesModal = new FabricantesModalViewModel(Fabricantes);
await Application.Current.MainPage.Navigation.PushModalAsync(new FabricantesModalView());
}