Fix that an error occurs when delete all member and all blog. bugid:110748
Change a test filename. bugid:110748
Bump up version number. bugid:110753
Apply MT::Sanitize->sanitize to the value of input if TinyMCE is disabled. bugid:110747
Update some tests. bugid:110747
Save all the event attributes. bugid:110831
Remove duplicated nodes that matched. bugid:110831
Remove redundant code for not displaying error message. bugid:110903
Revert "Remove redundant code for not displaying error message. bugid:110903"

This reverts commit 37748cfa3a89d71165417a89803694d4ffd3d7b1.
Merge branch 'internal-hotfix-5.2.9' into support-5.2x