Merge pull request #1017 from seasonyuu/development

TitleBarButton: Fix Foreground not using property value at initial

src/Wpf.Ui/Controls/TitleBar/TitleBarButton.cs

@@ -115,6 +115,7 @@ private void TitleBarButton_Unloaded(object sender, RoutedEventArgs e)
 
     private void TitleBarButton_Loaded(object sender, RoutedEventArgs e)
     {
+        RenderButtonsForeground = ButtonsForeground;
         DependencyPropertyDescriptor
             .FromProperty(ButtonsForegroundProperty, typeof(Brush))
             .AddValueChanged(this, OnButtonsForegroundChanged);