Fix some bugs of the TinyMCE. bugid:110656

* Save all the attributes attribute which performs JavaScript.
* Escape the value of comment/cdata.
* Reading of a style sheet was restricted by IE.
Bump up version numbers.
Fix checking config statement. bugid:110656
Save styles for IE. bugid:110656
Clear entry's cache for the "categories" if ANY placement was updated. bugid:106534
Fixed that DBPort directive is not respected in dynamic publishing. bugid:110714
Merge branch 'internal-hotfix-5.2.8' into support-5.2x
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
Merge tag 'mt5.2.9' into mt5.2.9-ru