Ability to change the e-mail like we can change the Nickname

[Subarasheese]

Greetings.

It would be useful to have the ability to change our e-mail credentials like most other platforms online do.

The interface would work the same way as we have currently for changing usernames, except it should send a confirmation mail first. If the user opens the token link on the e-mail, then the e-mail for that user will be changed on the database.