Change necessary now that there are true FLTK sub-windows on the Mac OS X platform.

git-svn-id: http://seriss.com/public/fltk/fltk/branches/branch-1.3@10468 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
Fix a doxygen warning.


git-svn-id: http://seriss.com/public/fltk/fltk/branches/branch-1.3@10469 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
Separate and improve documentation of overloaded Fl::event_state() methods.


git-svn-id: http://seriss.com/public/fltk/fltk/branches/branch-1.3@10470 ea41ed52-d2ee-0310-a9c1-e6b18d33e121