error handling from backend

[thieflord06]

Add UX for errors from the backend. i.e. refresh button in sections, pop up to reload again, etc.

Response Errors
400: {"error": "Invalid request"}, {"error": "No file provided"}
200: {"data": "Not found"}, {"data": "Account deactive", "reason": str}
409: {"error": "File name already exists"}
413: {"error": "File size limit exceeded."}
423: Locked
500: {"error": "Internal error"}
501: Not Implemented
503: {"error": "Connection error"}, {"error": "API is disabled"}
504: {"error": "Timeout"}
429: Rate limit exceeded

[thieflord06]

referencing #266 because it is dealing with this.