Display same UI to admins as normal users see

[mbarton]

At the moment as an audit team member you can edit a submission created from a CSV upload using the questionnaire. This is a deliberate design decision.

However it would be useful to still show the UI to the admin as if they were a normal user who can't. The admin can then opt in to editing via clicking an additional button etc.

This should make it less likely that we miss UI bugs in the future because we always test as admins. For example rcpch/rcpch-audit-engine#1184 in Epilepsy12.

[mbarton]

Interestingly I tried this on staging and I correctly can't edit the visits. Not sure what's different between the setup on staging vs what I have locally.

Either way we should say explicitly why the fields are disabled.