Revert "Retired concepts aren't showed as retired when listed as set members -"

This reverts commit 7cbf165379e569e0f8c6a471c6607b60a52066f9.
Revert "update all of these types of extension point links to use c:url so"

This reverts commit 83b204419e991c3abcb07b69b57c078f63e26045.
Updated obs did not get displayed correctly on dashboard - TRUNK-3609
Fixed @since value - TRUNK-3609
TRUNK-3949: Do not commit with validation errors