Fixed layout bug in viewer area.
Fixed layout bug in viewer area.

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