Check why vouchers appear even if disabled under study settings

added To Do label

mentioned in commit 446ddc77

mentioned in commit 5f01a5ce

mentioned in commit 20c39d1b

There is no condition control implemented in the sidebar at least in the master branch.

This has been implemented in branch bug/hide_vouchers_if_not_set_in_study

vouchers

mentioned in merge request !174 (merged)

added Done and removed To Do labels

closed via merge request !174 (merged)

mentioned in commit bbe5d91b

changed milestone to %0.12.0