[8] Review request for 8024395: Improve fix for line break calculations

[dmitry markov]

Hello,

Could you review the fix:
  bug: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=8024395
  webrev: http://cr.openjdk.java.net/~dmarkov/8024395/jdk8/webrev.00/
The fix reverts the changes added for JDK-8014863 and override 
forwardUpdate() method for LogicalView class located at FlowView. In 
other words View.forwardUpdate() will go back to its original behavior 
and LogicalView.forwardUpdate() will send update event to all views 
followed by the changed place. This event will cause view to drop the 
cache and re-calculate its break points.

Thanks,
Dmitry