I can't see why anyone who isn't a threat needs to be in the dock at this point.
Docks in UK courts can interfere with the defendent's ability to hear proceedings and communicate with their lawyers. They may also communicate a message that the person is a danger or guilty at a point where they are still presumed innocent. They add to the stress of proceedings, which is in nobody's interest if they want a balanced account of events. So I would be very much in favour of measures like this where the defendent requests it.
If she has committed a crime then whatever sentence she receives will be the punishment. The process of deciding whether she has committed a crime should not be a punishment in itself.