[lmi] wx-2.8.7: long menuitem truncated

[Greg Chicares]

A menuitem defined thus in 'menus.xrc':
        <object class="wxMenuItem" name="preview_summary">
            <label>Pre_view calculation summary\tCtrl-V</label>
            <help>Preview calculation summary</help>
        </object>
displays as
  Preview calculation summarCtrl-V
                            [^ several characters missing]
on msw-xp.

To reproduce:
  load lmi
  alt-F N I
  Enter
  pull down "Illustration" menu

Thirty-four characters may seem like a lot for a menuitem,
but I really want all of them: any abbreviation would just
create obscurity.