Request for integrating #227109 - Local Synchronization takes a very long time

Bug link:
https://netbeans.org/bugzilla/show_bug.cgi?id=227109

Description of the bug:
For NB 7.3, complete local synchronization of project is running on 
project open which takes time for large projects. The fix adds a 
checkbox that makes this initial synchronization optional.

Impact assessment:
This impacts all PHP users who use local synchronization (and have big 
projects).

Risk assessment:
IMHO there is almost no risk.

Fix:
http://hg.netbeans.org/web-main/rev/048df7f8373c
http://hg.netbeans.org/web-main/rev/36251d76c9c2

The fix was written by tmysik, reviewed by obrejla and verifed by vriha.

Thanks for the review,
Tomas