Message for when user enters an email that is not registered

[mariushuman]

Create a popup message that when a user enters an email address that is not registered on the DB that it friendly message saying that the user is not registered.

url - http://staging.pata.proversity.io

Steps:

1. Click on the link above
2. Click on Sign In
3. Click Forgot Password
4. enter en email address that is not registered - test@test.bla

Results
The user gets a popup message saying that an email was send.

Expected Results
The user should get a popup message saying the email does not exists and the user must use the emai address that was used to register.

[nicovanniekerk]

This will be done if we want and have time for it one day.