git-svn-id: https://geuz.org/svn/gmsh/trunk@20199 59c8cabf-10d6-4a28-b43f-3936b85956c4
git-svn-id: https://geuz.org/svn/gmsh/trunk@20200 59c8cabf-10d6-4a28-b43f-3936b85956c4
fixes for high resolution (retina) display


git-svn-id: https://geuz.org/svn/gmsh/trunk@20201 59c8cabf-10d6-4a28-b43f-3936b85956c4
git-svn-id: https://geuz.org/svn/gmsh/trunk@20202 59c8cabf-10d6-4a28-b43f-3936b85956c4