Loading indicator sits outside the viewport on large forms

[paulgain]

When editing a field at the bottom of a large form the loading indicator is outside of the viewport, unfortunately the user has no visual aid as to what is happening after they've saved the form unless they scroll to the top of the form bringing the loading indicator into the viewport.

I can see this being a problem with all large forms going forward. I realise it's work in progress but we should have a loading indicator that sits on top of the UI which is centrally positioned. Axios has the ability to intercept HTTP calls (like all HTTP clients) allowing us to add and remove a loading indicator.