Row hover background in DataGrid

[juusimaa]

Bug explanation

When AlternatingRowBackground is used MaterialDesign.Brush.DataGrid.RowHoverBackground does not take precedence over the alternating color.

To reproduce:

    <DataGrid AlternatingRowBackground="Green"
              CanUserAddRows="False"
              CanUserDeleteRows="False"
              IsReadOnly="True"
              ItemsSource="{Binding Numbers}">
        <DataGrid.Resources>
            <SolidColorBrush x:Key="MaterialDesign.Brush.DataGrid.RowHoverBackground" Color="Red" />
        </DataGrid.Resources>
        <DataGrid.Columns>
            <DataGridTextColumn Binding="{Binding .}" Header="Number" />
        </DataGrid.Columns>
    </DataGrid>

public partial class MainWindow
{
    public List<int> Numbers { get; }
    public MainWindow()
    {
        Numbers = Enumerable.Range(0, 100).ToList();
        DataContext = this;
        InitializeComponent();
    }
}

When mouse is over alternating green row background color stays green.

Version

5.3.0