It is possible to create a server in the server list with a blank name and/or IP address

The bug

It is possible to create a server in the server list with a blank name and/or IP address.

How to reproduce

1. Click "Add Server" in the multiplayer menu/Select an existing server (but not enter it) and click "Edit".
2. Leave all fields blank.
   Note that the "Done" button is not clickable
3. Press Enter.
   → In the server list a server appeared with a blank name.