UX fix in the registration form

[daminisatya]

After a new user submits the registration form, the page must be redirected to the login page instead of the refreshing the registration page itself.

Steps to reproduce

• Open http://127.0.0.1:5000/register
• Enter the required details in the form.
• Click Submit

Observation

• The form is refreshed which is assumed as submitted.

Required Changes for better UX

• The user must be shown a message indicating the submission of the form, hence showing a alert message "Successfully submitted"
• After submitting successfully the page must be redirected to the login page where the credentials can be entered