Apply nickname to all.

As the title states a button that allows you to apply a nickname to every server you are in.

Why?
Well to answer this it's really to help users to ping one another and could go a long way for mobile users.

Example: Lets say my discord name is קยŦŦเєรՇ some mobile users might not be able to see it and both mobile and desktop users can't ping me. 

But I really like the way it looks?!?!
So allowing one to have their nickname on all servers as קยŦŦเєรՇ but their user name be Puffiest#xxxx allows people to ping me, and keep the consistency of the name I like. (To translate קยŦŦเєรՇ is puffiest in some random font I found)

A compromise could include putting these fonts at the top of the mention recommendation / user list.

Obviously changing your nickname isn't hard on its own but for the sake of being in a ton of server it could help with QoL for everyone involved.