interactors() and navigators() modified to prevent returning a list with null elements
interactors() and navigators() modified to prevent returning a list with
null elements

rdebroiz/medInria-public,NicolasSchnitzler/medInria-public,NicolasSchnitzler/medInria-public,rdebroiz/medInria-public,NicolasSchnitzler/medInria-public,aabadie/medInria-public,rdebroiz/medInria-public,aabadie/medInria-public,aabadie/medInria-public