LSNBLDR-371; fix url cache


git-svn-id: https://source.sakaiproject.org/svn/lessonbuilder/branches/lessonbuilder-1.4.x@309231 66ffb92e-73f9-0310-93c1-f5514f145a0a
LSNBLDR-353; fix gradebook interface to take account of operations that can fail


git-svn-id: https://source.sakaiproject.org/svn/lessonbuilder/branches/lessonbuilder-1.4.x@309236 66ffb92e-73f9-0310-93c1-f5514f145a0a
LSNBLDR-343; missing title in some cases


git-svn-id: https://source.sakaiproject.org/svn/lessonbuilder/branches/lessonbuilder-1.4.x@309248 66ffb92e-73f9-0310-93c1-f5514f145a0a