[BUGFIX] Fix menus by adding missing NLSML instance tag

I hadn't even heard of NLSML until today but if my understanding is correct, the instance tag is required for menus to work. The interpretation value was coming through as nil, causing the first match statement to always be chosen.
Merge pull request #148 from chewi/bugfix/missing_nlsml_tag

[BUGFIX] Fix menus by adding missing NLSML instance tag