NB7.2 HR Fix: #215099 - SVN REVERT does not refresh file in editor

Description:
http://netbeans.org/bugzilla/show_bug.cgi?id=215099

File opened in editor not refreshed after revert operation in 
Subversion. The file must be closed and reopened in editor to get its 
actual state.

Impact assessment: According to Tomas Stupka it happens in 9 cases from 
10 for the Subversion Revert operation.

Risk assessment: low; only comparison of time stamps is extended.

The fix has been reviewed by Tomas Stupka and verified by QE.

Changesets:

http://hg.netbeans.org/main-golden/rev/29758473fe48

Thanks for review,
-Mila