added learningmaterials to session cloning so they are included when directors are added
added missing 'return false;' to add learning material function call
Merge pull request #669 from thecoolestguy/668_lm_dialog_disappears_in_FF_bugfix

learning material dialog disappears in firefox
Merge branch 'master' of github.com:ilios/ilios into 663_session_description_loss_bugfix