Nasty bug when using OverrideDefaultWindowCommandsBrush

[nikolovjovan]

After messing around with custom MetroWindow and WindowCommands styles I found a bug that disables Foreground property change for every WindowCommands' buttons and therefore keeps me from applying my custom style. If I have a style defined like this:

<Style x:Key="CleanMetroWindowStyle"
       TargetType="{x:Type controls:MetroWindow}"
       BasedOn="{StaticResource {x:Type controls:MetroWindow}}">
    <Setter Property="OverrideDefaultWindowCommandsBrush"
            Value="{DynamicResource BlackBrush}" />
    <Setter Property="TitleForeground"
            Value="{DynamicResource BlackBrush}" />
    <Setter Property="WindowTitleBrush"
            Value="{DynamicResource TransparentWhiteBrush}" />
    <Setter Property="NonActiveWindowTitleBrush"
            Value="{DynamicResource TransparentWhiteBrush}" />
    <Setter Property="WindowMinButtonStyle"
            Value="{DynamicResource CleanMetroWindowButtonStyle}" />
    <Setter Property="WindowMaxButtonStyle"
            Value="{DynamicResource CleanMetroWindowButtonStyle}" />
    <Setter Property="WindowCloseButtonStyle"
            Value="{DynamicResource CustomCloseWindowButtonStyle}" />
</Style>

And when I change Foreground property of WindowCommands' buttons like this:

<controls:MetroWindow.RightWindowCommands>
    <controls:WindowCommands Foreground="Red">
        <Button Content="Button 1"
                Foreground="Red" />
        <Button Content="Button 2"
                Foreground="Red" />
    </controls:WindowCommands>
</controls:MetroWindow.RightWindowCommands>

nothing changes and the buttons stay black. If I remove that setter, everything works as expected. So as a workaround I set the color manually in all of my custom styles.
I hope this can be fixed since it's a nice solution to simply change the color but for now it doesn't allow any further modifications to be made.

[nikolovjovan]

Fixed with the merged pull request #2152.