Remove BindsTwoWayByDefault from IsActiveProperty from ProgressRing

[michaelmairegger]

What changed?

Removed BindsTwoWayByDefault from IsActiveProperty. There is not need to apply TwoWay by default, because the GUI does not update the IsActive property in any parts of the code

REMARKS

The only change is when Visibility changed.

In that case. Would it be important that when the visibility of ProgessRing changes that IsActive is reflected to the bound property?

As crossreference, IsIndeterminate has the same behavior
http://referencesource.microsoft.com/#PresentationFramework/src/Framework/System/Windows/Controls/ProgressBar.cs,60ee7d94e2137368,references

[punker76]

@xxMUROxx I don't know if this maybe a functonal break? /cc @thoemmi

[thoemmi]

That is a breaking change. But ProgressRing.IsActive never changes on its own, so I don't think anybody expected two-way binding in the past. I'm fine with this PR.

[michaelmairegger]

That was my initial thought. I think nobody would use the value of IsActive (set when visibility changes) as part in the backend code. Generally IsActive is only set by backend code to display/hide the contol.