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
changed default status selection of learning materials to 'final' or index 1
Merge pull request #673 from thecoolestguy/672_final_as_lm_default_status

changed default status selection of learning materials to 'final' (index '1')