hg: openjfx/2.1/master/rt: fix RT-14798 : Mac: tooltips disappear right after they are displayed

[hang.vo at oracle.com]

Changeset: 92c2b4990fb3
Author:    Paru Somashekar <paru.somashekar at oracle.com>
Date:      2012-01-26 15:03 -0800
URL:       http://hg.openjdk.java.net/openjfx/2.1/master/rt/rev/92c2b4990fb3

fix RT-14798 : Mac: tooltips disappear right after they are displayed
RT-17171: Somtimes Tooltip disappears almost immediately.

! javafx-ui-controls/src/javafx/scene/control/Tooltip.java