Multiple layers for MapService provider

[robertd]

How can we set multiple layers for L.esri.Geocoding.Controls.Geosearch.Providers.MapService provider?

[patrickarlt]

I remembered why I didn't implement this initially.

To query the feature after a suggestion is selected you also need to pass the id of the layer that the suggested feature was on. Initially this proved really complicated but this has now been asked for my multiple people (@robertd and @brightrain) I'll take another look at it.

[patrickarlt]

@robertd @brightrain I've got this working now look for it in a future version soon.