it takes a window pointer, and grab(0) releases. You can now call grab
repeatedly with the same or different values without it failing. The old
Fl::grab() and Fl::release() are emulated in inline functions in Fl.H
Added Fl_Menu_::copy(Fl_Menu_Item*), which will be useful for fluid, although
that use is nyi.
Fixes and cleanup to the code for Fl_Menu_::add(...).
git-svn-id: file:///fltk/svn/fltk/trunk@268 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
