Fix hospital name side effect on empty or null

[pstaylor-patrick]

When I erase the value of the hospital name field in the onboarding flow then it automatically resets to a inferred value from the users's email address when it should instead remain blank and enter into an error state so that the user can manually enter their preferred hospital name

I suspect this will be a fix in the use effect function on state re-render to protect against redundant injections of a default placeholder value into the actual input value in state