Configure enhancements for Cygwin (STR #2974).

Remove obsolete -mno-cygwin option for Cygwin -> MinGW/WIN32 compilation.


git-svn-id: http://seriss.com/public/fltk/fltk/branches/branch-1.3@10344 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
Added control of the Fl::OPTION_FNFC_USES_GTK option in the "Edit/Global FLTK Settings" menu item of fluid.

git-svn-id: http://seriss.com/public/fltk/fltk/branches/branch-1.3@10345 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
These files should be created by fluid from alignment_panel.fl. So, back to their previous versions.

git-svn-id: http://seriss.com/public/fltk/fltk/branches/branch-1.3@10346 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
Added control of the Fl::OPTION_FNFC_USES_GTK option in the "Edit/Global FLTK Settings" menu item of fluid.

git-svn-id: http://seriss.com/public/fltk/fltk/branches/branch-1.3@10347 ea41ed52-d2ee-0310-a9c1-e6b18d33e121