[FIX] auto subscription
- removed auto subscription of managers for leave / allocation requests as this
can be managed through subscripion to the department
- updated some subtype labels
- removed auto subscription of leave / allocation creator as the employee is already
automatically subscribed; managers creating leave and allocation in batch should
not automatically follow the created records except through the department
subscription
[FIX] notification email batch
- add a context key to use the email queue for notifications linked
to allocations created in batch
- also fixed a missing context in a browse