Use BusyHelper for IsBusy change

[StefanOssendorf]

csla/Source/Csla.Blazor/ViewModel.cs

Lines 239 to 248 in 58e52be

	if (obj.IsBusy)
	{
	var stopTime = DateTime.Now + BusyTimeout;
	while (obj.IsBusy)
	{
	if (DateTime.Now > stopTime)
	throw new TimeoutException("SaveAsync");
	await Task.Delay(1);
	}
	}

This should be replaced by the BusyHelper class from Csla.Core to avoid the spin wait.

[Freelancingonupwork]

Hello.
csla/Source/Csla/Core/BusyHelper.cs is internal static class. so, I can not use this class in Csla.Blazor due to it's protection level.

[ossendorf-at-hoelscher]

Hi. You can make the BusyHelper public to use it there.
Cheers Stefan