Handle failed and loading state for file upload

[olavis]

We need to successfully create a model before the file upload process can start, meaning that we could possibly have a scenario where we have a model without the "required" NC-file. This is intentional, because we want to be able to close the upload model dialog and have the incomplete model in the browse table while we display upload status for it. Might need a loading status on the confirm button in the dialog (while we wait for model to be created) and to prevent the dialog from closing if the request failed. Then banner, snackbar, or info of some kind(?? UX help?? @o-jorgensen 🙇🏼‍♀️) to make the user try again? Also, different issue, but handle possibly failed file upload afterwards?