======================== Slightly modified icons based on Jim's original proposal (with the center instead of the focus point): http://forum.freecadweb.org/viewtopic.php?f=10&t=8038&hilit=hyperbola#p66129
======================== Slightly modified icons based on Jim's original proposal (with the center instead of the focus point): http://forum.freecadweb.org/viewtopic.php?f=10&t=8038&hilit=hyperbola#p66129