[FIX] Only include feature_wiki_mandatory_category and flaggedrev_approval_categories in the form if the categories feature is turned on, otherwise they appear to be set when other preferences are changed.
[FIX] Only include feature_wiki_mandatory_category and flaggedrev_approval_categories in the form if the categories feature is turned on, otherwise they appear to be set when other preferences are changed.

git-svn-id: a7fabbc6a7c54ea5c67cbd16bd322330fd10cc35@32470 b456876b-0849-0410-b77d-98878d47e9d5

changi67/tiki,changi67/tiki,tikiorg/tiki,tikiorg/tiki,changi67/tiki,tikiorg/tiki,oregional/tiki,oregional/tiki,oregional/tiki,oregional/tiki,tikiorg/tiki,changi67/tiki,changi67/tiki