[bp/r52075 modified][FIX] requireConfirm: Display the busy spinner (tikiModal) on objects that requireConfirm while the service is running, e.g. clearing tracker items or removing fields

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@52076 b456876b-0849-0410-b77d-98878d47e9d5