Bug 214421 - Withdraw poorly tested fix for #212895

Hi,

I want to revert fix for 212895 from NB-7.2, which was made right before 
branching. The fix was apparently not thoroughly tested as it caused 2 
reported issues already, and during review of the code, I have found a 
potential deadlock.
I believe it is safer to revert the fix for the upcoming release, work 
on it some more, and when stable, propagate it to e.g. 7.2.1.

Issue: http://netbeans.org/bugzilla/show_bug.cgi?id=214421
Impact: exceptions that may appear for JS, PHP, CSS users after file 
open or caret positioning
Risks: none: reverting to the 7.1.2 implementation
Changeset info: http://hg.netbeans.org/jet-main/rev/b311735c9afc

(the changeset was made as a diff between head and rev. 266ce29def2b, 
stripped unrelated changes)

Thanks,
-Svata