Pop-ups when features are clicked

[mstenta]

farmOS currently displays a popup when areas are clicked in the farm_areas map, as well as when the cluster icon is clicked in asset cluster maps.

We can use this library: https://github.com/walkermatt/ol-popup

[mstenta]

This will require a little figuring out, with regard to how we retrieve the necessary content from the server to display in the popup. That information is coming from a Drupal View in farmOS currently. We may be able to reuse that, but I will have to review/refresh on the details.

[mstenta]

walkermatt/ol-popup#145

[mstenta]

This turned out to be extremely easy - just a matter of connecting a few things that already existed.

This will require a little figuring out, with regard to how we retrieve the necessary content from the server to display in the popup.

This is being handled in a behavior provided by the farm_area module in farmOS - so farmOS-map doesn't need to worry about it at all.