[Lazarus] New menu designer

[Bart]

On 12/22/15, Juha Manninen <juha.manninen62 at gmail.com> wrote:
> Hello
>
> I committed a new Menu Designer by Howard Page-Clark in r50992.
> See:
>   http://bugs.freepascal.org/view.php?id=29205

Can we implement it so that adding a sumnenu to a Separator (a
menuItem with '-' as caption) will either be disallowed, or a warning
will be shown because several widgetsets crash on that.
(Same for setting Caption to '-' of an existing item with a submenu.)

See http://bugs.freepascal.org/view.php?id=24476

Bart