Update votes validated

It should be impossible to delete or add votes when the desk is validated

changed milestone to %Votes

added Backend Front end labels

added To Do label

assigned to @apoyen

removed To Do label

added To Do label

added Doing label and removed To Do label

created branch 38-update-votes-validated to address this issue

mentioned in merge request !48 (merged)

closed via merge request !48 (merged)

mentioned in commit bcddd3f0