Fixes #228 Checkbox style: white tick symbol
Fixes #228 Checkbox style: white tick symbol

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