Updated the NumberBox.Value Default UpdateSourceTrigger to LostFocus

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Pull request type

Please check the type of change your PR introduces:

• Update
• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes

What is the current behavior?

Currently the NumberBox.ValueProperty default UpdateSourceTrigger for bindings is UpdateSourceTrigger.Default.

Issue Number: N/A

What is the new behavior?

The NumberBox.ValueProperty default UpdateSourceTrigger for bindings is now UpdateSourceTrigger.LostFocus.

Other information

Since the Value for the NumberBox is a text-based property, Microsoft recommends the default UpdateSourceTrigger should be LostFocus.

• Binding.UpdateSourceTrigger Property

The System.Windows.Controls.TextBox documentation says:

When used in data-binding scenarios, this property uses the default update behavior of UpdateSourceTrigger.LostFocus. (source)