Could we use staff everywhere on the backend?

[Valentina R]

Someone reported that it's confusing having 'staff' and 'provider' on the backend. Example where 'provider' is used is on the Appointments calendar page in the dashboard. Everywhere else we seem to be using 'staff'.

Reported here: https://bookingwp.com/forums/topic/appointment-slots-can-be-over-booked/

[Željan Topić]

Added "Staff:" to calendar in admin as well with 4.0.1 update.