SAK-27934 hide content review's inline submission files from 'select from workspace or site' file pickers. Add said file picker to single file upload only assignments; patch from Brian B.

git-svn-id: https://source.sakaiproject.org/svn/assignment/trunk@314596 66ffb92e-73f9-0310-93c1-f5514f145a0a
SAK-27933 false message to instructors about draft mode when creating an assignment with content review fails; patch from Brian B.

git-svn-id: https://source.sakaiproject.org/svn/assignment/trunk@314597 66ffb92e-73f9-0310-93c1-f5514f145a0a