Changes asked in !135

• list of voucher partners doesn't include disable column
• tooltip on a button changed

smash/web/forms/__init__.py

+from study_forms import StudyEditForm, StudyNotificationParametersEditForm, StudyColumnsEditForm
 from worker_form import WorkerForm
 from forms import VisitDetailForm, \
     VisitAddForm, KitRequestForm, StatisticsForm, AvailabilityAddForm, \
@@ -12,4 +13,4 @@ __all__ = [StudySubjectAddForm, StudySubjectDetailForm, StudySubjectEditForm, Wo
            AppointmentDetailForm, AppointmentEditForm, AppointmentAddForm, VisitDetailForm, VisitAddForm,
            ContactAttemptAddForm, ContactAttemptEditForm, KitRequestForm, StatisticsForm, AvailabilityAddForm,
            AvailabilityEditForm, HolidayAddForm, SubjectAddForm, SubjectEditForm, SubjectDetailForm, VoucherTypeForm,
-           VoucherTypePriceForm, VoucherForm]
+           VoucherTypePriceForm, VoucherForm, StudyEditForm, StudyNotificationParametersEditForm, StudyColumnsEditForm]