BLTI-219

Add error.placement.not.found key to properties



git-svn-id: https://source.sakaiproject.org/svn/basiclti/trunk@120995 66ffb92e-73f9-0310-93c1-f5514f145a0a
BLTI-217
BLTI-218

Change the notion of text fields from tweaking hidden property
based on the "allow..." field in the controlling row to adding a new property called allowed=true - which indicates to check the "allow..." field in the controlling row.



git-svn-id: https://source.sakaiproject.org/svn/basiclti/trunk@120996 66ffb92e-73f9-0310-93c1-f5514f145a0a