i18n: add contextual marker in some js translations
i18n: add contextual marker in some js translations

Nikola-K/django-recurrence,linux2400/django-recurrence,django-recurrence/django-recurrence,Nikola-K/django-recurrence,FrankSalad/django-recurrence,linux2400/django-recurrence,FrankSalad/django-recurrence,django-recurrence/django-recurrence