add masking to datalinks and empty trash
CORE-4671: Corrected SideErrorHandler issue in
File/FolderSelectorFields.
CORE-4671:
* More corrections to side error issue.
CORE-4671: Added KLUDGE annotations 
This is to track the changes related to this ticket, as they will have
to be revisited when we update GXT.
core-4604 allow meta data editing for files / folders with write
permissions.
CORE-4691 Update for new ImportUrlValidator.

Updated FileUploadByUrlDialog to use the new ImportUrlValidator.
Merge branch 'master' into STABLE