fixing bug #5907 on IE9
on feature #14, fixing a bug about double notification on create and update actions.

Conflicts:
	blog/blog-jar/src/main/java/com/silverpeas/blog/control/DefaultBlogService.java
on feature #5515, fixing a Javascript error when user wants to delete a news (in edition view)...
fixing bug #5959
Some corrections:
- fixing a wrong behavior around anonymous user and quick news
- fixing the non acknowledgment registration of the last blocking news on Firefox