[#508, #512] [Hugo, Mukiza] allows comma separated options in question options and does not duplicate question options
#508 [Hugo, Emily] cannot remove last question option when creating a new question
#522 JS validation on create skip rules in ie9
[Remo, Mukiza] #397 turn off particular cells in a grid
#526 [Mukiza, Remo] delete blank groups after unassigning questions
Fixing snap-ci not reporting errors