cubicweb-leaflet #4029903 The cluster layer is missing on the map [validation pending]

prioritynormal
typebug
done in0.2.0
load0.200
load left0.000
closed by#e5aba7767380 [js] Correctly add the cluster layer to the map, closes #4029903
patch[js] Correctly add the cluster layer to the map, closes #4029903 [applied]