feat: add hint-text as AutomationProperty to the ComboBox by default so it can be picked up by a screen reader

Author: corvinsz

src/MainDemo.Wpf/Home.xaml

@@ -54,6 +54,11 @@
             <TextBlock Margin="8,0,0,0" Text="EXPLORE" />
           </StackPanel>
         </Button>
+
+        <ComboBox materialDesign:HintAssist.Hint="Routing"
+                  Style="{StaticResource MaterialDesignFilledComboBox}"
+                  Width="400"/>
+        
       </StackPanel>
     </Grid>
 

src/MaterialDesignThemes.Wpf/Themes/MaterialDesignTheme.ComboBox.xaml

@@ -884,6 +884,7 @@
   </ControlTemplate>
 
   <Style x:Key="MaterialDesignComboBox" TargetType="{x:Type ComboBox}">
+    <Setter Property="AutomationProperties.Name" Value="{Binding Path=(wpf:HintAssist.Hint), RelativeSource={RelativeSource Self}}" />
     <Setter Property="Background" Value="Transparent" />
     <Setter Property="BorderBrush" Value="{DynamicResource MaterialDesign.Brush.ComboBox.Border}" />
     <Setter Property="BorderThickness" Value="0,0,0,1" />