<Swing Dev> RFR: 8190475: SwingSet2 won't start

[Phil Race]

Bug: https://bugs.openjdk.java.net/browse/JDK-8190475
Webrev: http://cr.openjdk.java.net/~prr/8190475/

Nor will Java2Demo .. and at least one beans test is failing (hanging) 
in the same place.
All hanging in the new code added by the fix for
6463710: ListSelectionModel.setSelectionMode() underspecified

In this change I am completely reverting that fix because of this P1 bug.

-phil.