LSNBLDR-397; can't remove gradebook entry


git-svn-id: https://source.sakaiproject.org/svn/lessonbuilder/branches/lessonbuilder-1.4.x@310270 66ffb92e-73f9-0310-93c1-f5514f145a0a
LSNBLDR-385; CC import validation errors


git-svn-id: https://source.sakaiproject.org/svn/lessonbuilder/branches/lessonbuilder-1.4.x@310271 66ffb92e-73f9-0310-93c1-f5514f145a0a