fixed back button

-moved #menuButton onclick function into home.controller.js
-set snap options (disable/enable) based on state.
I see what you are trying to do here... perhaps try using "resolve" or "onEnter" to see if you can get that to work.  If it is too complicated, then let's do it this way and then figure it out later.  

the reason why I am pushing for using that is that the code can be more scoped and modular.