added flask-cors and used allow cross_allowed_origins to fix the issue seen on prod cluster (400 CORS error)

made UI changes to the app

See merge request rc/self-reg-form!8

sending text message for welcome message, error message and cancel message as a variable from messages.py

Merge branch 'feat-change-logo' of https://gitlab.rc.uab.edu/krish94/self-reg-form into feat-ui-changes

Changed account error message from send_msg to use socket.emit and send the error message to the UI
Removed account timeout while testing, to ensure error's caused are only due to rabbitmq account create error and not timeout from client to server