GtkOptionMenu displays the
currently active item from among a number of options;
when clicked, it pops up a menu to allow the user to
make a new item active. The option menu is slightly
broken; it does not take the size of the menu items
into account when requesting its size. If you have menu
items containing labels in the option menu, the labels
will often be truncated. The best workaround is to give
the option menu more space than it requests, by setting
appropriate options on its parent container.
