ECMS-5948: ArrayIndexOutOfBoundsException when saving an ECMS script

Fix description:
  - verify the array size before access the first element

Conflicts:

	core/webui/src/main/java/org/exoplatform/ecm/webui/utils/Utils.java
ECMS-6082: SEO Management (robots.txt and sitemaps.xml) doesn't work

Fix description:
	- Save robot content in String format
ECMS-6085: Cannot re-publish contents outside of Collaboration/sites folder

Fix description:
  - Propagate the event of content modification for node inside /sites and those outside /sites but published before.
ECMS-6089: [IE8] [Content Explorer] Exception thrown when clicking on the link of Relations

Fix description:
	- Use onclick for action instead of href