Describe the feature:
When connected to a WMS map data source, it would be great if we could visualize the legend associated with the layer.
Describe a specific use case for the feature:
An example. I add the "Obs. Precipitation" layer from https://www.efas.eu/api/wms/ and I hope to be able to consult the information attached to the image.
Describe the feature: When connected to a WMS map data source, it would be great if we could visualize the legend associated with the layer.
Describe a specific use case for the feature: An example. I add the "Obs. Precipitation" layer from https://www.efas.eu/api/wms/ and I hope to be able to consult the information attached to the image.![legend_obs_precipitacion](https://user-images.githubusercontent.com/16767290/82121564-5bd41f80-978e-11ea-9aaf-4e666b640f6d.JPG)