Pass click coordinate into farmOS-map.popup event

[mstenta]

We provide an addPopup() method on map instances, which initializes a new Popup and dispatches a custom farmOS-map.popup event when a singleclick is performed on the map. However, it doesn't pass the click coordinate into the farmOS-map.popup, so that coordinate isn't available to other behaviors who want to hook into the popup display.

For example, the event on this line:

https://github.com/farmOS/farmOS/blob/fc77c86abe6b142702e7b103cd85e0c207333b79/modules/core/ui/map/js/farmOS.map.behaviors.asset_type_layers.js#L91

Is NOT the same event as this one:

farmOS-map/src/instance/methods/popup.js

Line 16 in 777758f

popup.show(event.coordinate, content);

... so event.coordinate is not accessible in the downstream behavior.

[paul121]

@symbioquine mentioned we might be able to just change the event.type to be `farmOS-map.popup' and pass on the original event attributes. We just need to make sure we don't loose any of the existing attributes at the same time

[paul121]

Ha - related: walkermatt/ol-popup#145 (comment)