Add modal window when verification was successfully completed

[oksanahorishna]

As a user
I want to know that I am registered
So that I know my previous actions were successful

Given I am on the email page with the verification link
When I click on the link
And I am verified and registered
Then I should be redirected to the Login page
And I should see the modal window that says: "Вітаємо! Ви успішно пройшли верифікацію."
And I should be able to close the window

Design - link

Linked user story: #10
Linked epic: #3

[mehalyna]

Are you sure that it is a good idea to authorize and move to the Profile Page through the verification link at once?

1. We don't use any sockets (like chats etc.)
2. It's a bad idea from the side of security and confidence - to pass credentials for login through the link.
   Consequently, we need to change this task (or US)
   Additionally the mockup of the modal window is different from the previous modal windows.

[oksanahorishna]

@mehalyna good point. I've changed redirection from my profile to login page.