ux: commit list in HISTORY page will always turn AllowAutoHide off (#1980) (#1794)

Signed-off-by: leo <longshuang@msn.cn>

Author: love-linger

src/Resources/Styles.axaml

@@ -240,6 +240,7 @@
     <Setter Property="MinHeight" Value="12"/>
     <Setter Property="ShowDelay" Value="0:0:0.1"/>
     <Setter Property="HideDelay" Value="0:0:0.2"/>
+    <Setter Property="Background" Value="Transparent"/>
 
     <Style Selector="^ /template/ RepeatButton">
       <Setter Property="Background" Value="Transparent" />
@@ -264,7 +265,7 @@
       <Setter Property="Height" Value="8" />
       <Setter Property="Template">
         <ControlTemplate>
-          <Border Background="Transparent" UseLayoutRounding="False">
+          <Border Background="{TemplateBinding Background}" UseLayoutRounding="False">
             <Grid Name="PART_RootGrid" ColumnDefinitions="12,*,12">
               <RepeatButton Name="PART_LineUpButton"
                             Grid.Row="0" Grid.Column="0"
@@ -318,7 +319,7 @@
       <Setter Property="Width" Value="8" />
       <Setter Property="Template">
         <ControlTemplate TargetType="ScrollBar">
-          <Border Background="Transparent" UseLayoutRounding="False">
+          <Border Background="{TemplateBinding Background}" UseLayoutRounding="False">
             <Grid RowDefinitions="12,*,12">
               <RepeatButton Name="PART_LineUpButton"
                             Grid.Row="0"

src/Views/Histories.axaml

@@ -25,7 +25,7 @@
 
     <Grid Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="3">
       <DataGrid x:Name="CommitListContainer"
-                Classes.static_scrollbar="{Binding Source={x:Static vm:Preferences.Instance}, Path=!UseAutoHideScrollBars, Mode=OneWay}"
+                ScrollViewer.AllowAutoHide="False"
                 Background="{DynamicResource Brush.Window}"
                 SelectionMode="Extended"
                 ItemsSource="{Binding Commits, Mode=OneWay}"
@@ -52,15 +52,18 @@
           <SolidColorBrush x:Key="DataGridGridLinesBrush" Color="{DynamicResource Color.Border0}" />
         </DataGrid.Resources>
 
-        <DataGrid.Styles>     
-          <Style Selector="DataGrid.static_scrollbar">
+        <DataGrid.Styles>
+          <Style Selector="DataGrid">
             <Style Selector="^ /template/ DataGridRowsPresenter#PART_RowsPresenter">
               <Setter Property="Grid.RowSpan" Value="1" />
               <Setter Property="Grid.ColumnSpan" Value="2" />
             </Style>
             <Style Selector="^ /template/ DataGridColumnHeadersPresenter#PART_ColumnHeadersPresenter">
               <Setter Property="Grid.ColumnSpan" Value="1" />
             </Style>
+            <Style Selector="^ /template/ ScrollBar">
+              <Setter Property="Background" Value="{DynamicResource Brush.Contents}"/>
+            </Style>
           </Style>
 
           <Style Selector="DataGridColumnHeader">