fix: column headers mis-aligned with rows

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

Author: love-linger

src/Views/Histories.axaml

@@ -25,6 +25,7 @@
 
     <Grid Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="3">
       <DataGrid x:Name="CommitListContainer"
+                Classes="static_scrollbar"
                 ScrollViewer.AllowAutoHide="False"
                 Background="{DynamicResource Brush.Window}"
                 SelectionMode="Extended"
@@ -53,13 +54,13 @@
         </DataGrid.Resources>
 
         <DataGrid.Styles>
-          <Style Selector="DataGrid">
+          <Style Selector="DataGrid.static_scrollbar">
             <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" />
+              <Setter Property="Grid.Column" Value="0" />
             </Style>
             <Style Selector="^ /template/ ScrollBar">
               <Setter Property="Background" Value="{DynamicResource Brush.Contents}"/>
@@ -187,7 +188,7 @@
                             Opacity="{Binding IsMerged, Converter={x:Static c:BoolConverters.IsMergedToOpacity}}"
                             IsHitTestVisible="False"/>
 
-                  <Border Grid.Column="1" Padding="8,0,4,0" ClipToBounds="True">
+                  <Border Grid.Column="1" Padding="8,0" ClipToBounds="True">
                     <TextBlock Text="{Binding Author.Name}"
                                FontWeight="{Binding IsCurrentHead, Converter={x:Static c:BoolConverters.IsBoldToFontWeight}}"
                                Opacity="{Binding IsMerged, Converter={x:Static c:BoolConverters.IsMergedToOpacity}}"