[8u] Review Request: RT-36838 - Strange behavior of TreeItem's disclosure arrow // expanded/collapsed state not reflected correctly

[David Grieve]

This bug was reviewed and approved before, but in looking for a fix for 
RT-36995, I found some issues with the fix. Namely, that it was possible 
to have more than one REAPPLY queued up and that it was possible for the 
REAPPLY happen without a following UPDATE. Rather than roll the fixes 
for these issues into RT-36995 (especially given than the fix for 
RT-36995 is dead simple), I reopened RT-36838.

http://cr.openjdk.java.net/~dgrieve/RT-36838/webrev.01
https://javafx-jira.kenai.com/browse/RT-36838