hg: openjfx/8u-dev/rt: RT-36400: Improve TreeTableView support for screen readers.

[hang.vo at oracle.com]

Changeset: a80fe897c467
Author:    jgiles
Date:      2014-04-02 13:57 +1300
URL:       http://hg.openjdk.java.net/openjfx/8u-dev/rt/rev/a80fe897c467

RT-36400: Improve TreeTableView support for screen readers.
This changeset somewhat improves the mac support for TreeTableView, but there
is still more work outstanding (particularly around duplicated cell text in voice over).
Note that the TreeTableCell role is an NSAccessibilityStaticTextRole. It could
alternatively be a NSAccessibilityCellRole (with the added benefit that cell
information would be read out), but I don't think it is worthwhile doing this yet.
The current approach is more in line with how TreeTable controls are represented on Mac.

! modules/graphics/src/main/java/com/sun/glass/ui/mac/MacAccessible.java