hg: openjfx/8/graphics/rt: Properly handle null conditions for toggle groups in session manager.

[hang.vo at oracle.com]

Changeset: 8d00dde67975
Author:    axlee at AXLEE-LAP
Date:      2013-06-17 14:01 -0700
URL:       http://hg.openjdk.java.net/openjfx/8/graphics/rt/rev/8d00dde67975

Properly handle null conditions for toggle groups in session manager.

! apps/experiments/3DViewer/src/main/java/com/javafx/experiments/jfx3dviewer/SessionManager.java