cubicweb-leaflet #14231239 Markers are not shown when serving Leaflet from local files [validation pending]

When using the local version of Leaflet shipped with this cube (instead of the CDN), markers are not shown. We get a 404 error for files marker-icon.png and marker-shadow.png.

done in0.5.0
load left0.000
closed by#6e894a1fbe40 [pkg] Include images folder in pkg
patch[pkg] Include images folder in pkg [applied]