Revert "ECMS-4199 Content Explorer: Error on Relation Panel of WAI Portal's home page"

This reverts commit d9f3c3a6760ec41989c2c6687fb34db262753019.

Conflicts:
	upgrade-plugins/src/main/resources/conf/portal/configuration.xml
Merge commit '63ce9f0ae7ecfe125598d82b0b3f53c93f629989' into HEAD