Add a prop to configure whether <kbd>esc</kbd> should close the panel

[cyrilfretlink]

This change is useful when you have multiple components listening to esc and you don’t want to close them all at the same time (e.g. if you render this component inside a modal or a side panel).

[coveralls]

Coverage remained the same at 91.319% when pulling 273181d on fretlink:master into 77862ae on react-component:master.

[nasy]

I think this would be useful, I am facing a problem is that when I click on the selector it closes both the selector modal and the other modal I have open.

Until this gets merged doo you know any workaround for this @cyrilfretlink ?

[cyrilfretlink]

It may be possible to toggle some state in onClose and to decide to close your other components or not based on this state but merging this fix would make it much easier.