fix(controls): Re-format NumberBox on MaxDecimalPlaces change

[Bintel]

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?

MaxDecimalPlaces on NumberBox has no PropertyChangedCallback. Changing it at runtime has no effect on the displayed text — the text only re-formats when Value changes.

What is the new behavior?

MaxDecimalPlacesProperty registers an OnMaxDecimalPlacesChanged callback that calls the existing private UpdateTextToValue() helper, re-formatting the display via NumberFormatter.FormatDouble(Math.Round((double)Value, MaxDecimalPlaces)) whenever MaxDecimalPlaces changes. Follows the same pattern as OnValueChanged and OnNumberFormatterChanged.

Other information