Corrected case when using retina display.

git-svn-id: http://seriss.com/public/fltk/fltk/branches/branch-1.3@10472 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
Improve tooltip behavior for huge tooltips: remove flicker, support key/mouse dismiss

Fixes STR 2650.


git-svn-id: http://seriss.com/public/fltk/fltk/branches/branch-1.3@10473 ea41ed52-d2ee-0310-a9c1-e6b18d33e121