DeliveryAdminWindow: Show delivery (part) comments in list

Elwig/Windows/DeliveryAdminWindow.xaml

@@ -295,6 +295,7 @@
                     <DataGridTextColumn Header="LsNr." Binding="{Binding LsNr}" Width="120"/>
                     <DataGridTextColumn Header="Mitglied" Binding="{Binding Member.AdministrativeName}" Width="180"/>
                     <DataGridTextColumn Header="Zu-/Abschläge" Binding="{Binding FilteredModifiersString}" Width="150"/>
+                    <DataGridTextColumn Header="Kommentar" Binding="{Binding CommentsString}" Width="150"/>
                 </DataGrid.Columns>
             </DataGrid>