ux: remove MaxHeight of commit info panel in submodule diff view (sourcegit-scm#2057)

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

Author: love-linger

src/Views/DiffView.axaml

@@ -270,7 +270,7 @@
                       <ContentControl.DataTemplates>
                         <DataTemplate DataType="m:RevisionSubmodule">
                           <Border Margin="0,0,0,8" BorderThickness="1" BorderBrush="{DynamicResource Brush.Border1}" Background="{DynamicResource Brush.Window}">
-                            <v:CommitBaseInfo MaxHeight="256" Margin="0,4,8,6" Content="{Binding Commit}" FullMessage="{Binding FullMessage}"/>
+                            <v:CommitBaseInfo Margin="0,4,8,6" Content="{Binding Commit}" FullMessage="{Binding FullMessage}"/>
                           </Border>
                         </DataTemplate>
                       </ContentControl.DataTemplates>
@@ -294,7 +294,7 @@
                     <ContentControl Content="{Binding New}">
                       <ContentControl.DataTemplates>
                         <DataTemplate DataType="m:RevisionSubmodule">
-                          <v:CommitBaseInfo MaxHeight="256" Margin="0,4,8,6" Content="{Binding Commit}" FullMessage="{Binding FullMessage}"/>
+                          <v:CommitBaseInfo Margin="0,4,8,6" Content="{Binding Commit}" FullMessage="{Binding FullMessage}"/>
                         </DataTemplate>
                       </ContentControl.DataTemplates>
                     </ContentControl>