cubicweb-leaflet #15027970 Brocken map : L.MarkerClusterGroup is not a constructor [validation pending]

When using "cluser"T setting, the map is brocken because of "L.MarkerClusterGroup is not a constructor" A missing "leafletcluster/leaflet.markercluster-src.js" file must be added

priorityimportant
typebug
done in0.5.1
load left0.000
closed by#2121398cbe1e Add a missing file to prevent "L.MarkerClusterGroup is not a constructor" error (closes #15027970)
patchAdd a missing file to prevent "L.MarkerClusterGroup is not a constructor" error (closes #15027970) [applied]