ux: use larger icon in collapsed sidebar

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

Author: love-linger

src/Views/Repository.axaml

@@ -715,8 +715,8 @@
       <ListBox Background="Transparent" SelectedIndex="{Binding SelectedViewIndex, Mode=TwoWay}" SelectionMode="AlwaysSelected">
         <ListBox.Styles>
           <Style Selector="Path.icon">
-            <Setter Property="Width" Value="16"/>
-            <Setter Property="Height" Value="16"/>
+            <Setter Property="Width" Value="18"/>
+            <Setter Property="Height" Value="18"/>
             <Setter Property="Fill" Value="{DynamicResource Brush.FG1}"/>
             <Setter Property="HorizontalAlignment" Value="Center"/>
             <Setter Property="VerticalAlignment" Value="Center"/>