Remember custom FHIR server location

[vadi2]

It would be a nice QoL improvement if the app remembered the custom FHIR server you're using between reloads!

[plynchnlm]

There is a secret "server" parameter you can specify in the URL, e.g.:
https://lhcforms.nlm.nih.gov/lforms-fhir-app/?server=https:%2F%2Flforms-fhir.nlm.nih.gov%2FbaseR4
I suppose we could also put it in session storage.