DOM node ( memory ) leak

[olivierchatry]

to clear event listener we are using mousetrap._handleKeyEvent which is actually not defined ( it is private to the library ).

so basically, when assigning on a component, we will be leaking DOM nodes because of that.

The only way I can see to do that is to clone moustrap somewhere, add a function to cleanup ( moving the cleanup code from this addon to mousetrap ), create a PR and wait for it to be accepeted.

In the mean time, we can use the cloned moustrap to fix this issue.

[olivierchatry]

ccampbell/mousetrap#427