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Fixes an issue noticed by @ximenesuk https://github.com/openmicroscopy/openmicroscopy/pull/2861#issuecomment-50869057

To test, search for P/D/I that are not in your current group (group shown in the group/user chooser in web). Pick a search result from a different group and try to add a Comment AND a File Annotation. After adding, check annotations were saved by reloading right panel (select another result then reselect annotated result).