Fix bug http://bugs.adobe.com/jira/browse/SDK-18230 setLayoutMatrix does not apply matrix immediately to GraphicElement with more than one DisplayObject
http://bugs.adobe.com/jira/browse/SDK-18231 setLayoutMatrix does not apply immediately to BitmapGraphic
There are two problems that caused these bugs: 1 - we had an obsolete check in computeMatrix() that was returning null if the GraphicElement didn't have its display object assigned just yet. 2 - the setLayoutMatrix and setLayoutMatrix3D methods didn't invalidate properly GraphicElements that are sharing display objects.
QE Notes: None
Doc Notes: None
Bugs: SDK-18230, SDK-18231
tests: checkintests, mustella (layout)