Adds a new GtkMenuItem to a (table) menu. The number of 'cells' that
an item will occupy is specified by left_attach, right_attach,
top_attach and bottom_attach. These each represent the leftmost,
rightmost, uppermost and lower column and row numbers of the table.
(Columns and rows are indexed from zero).
Note that this function is not related to gtk_menu_detach().
Since 2.4
Adds a new GtkMenuItem to a (table) menu. The number of 'cells' that an item will occupy is specified by left_attach, right_attach, top_attach and bottom_attach. These each represent the leftmost, rightmost, uppermost and lower column and row numbers of the table. (Columns and rows are indexed from zero). Note that this function is not related to gtk_menu_detach(). Since 2.4