What I expected to happen was...:
When you click one of the text input fields in the 'add server' or 'edit server' window, the box highlights and an underscore starts blinking to signal that you can write there. If you click anywhere else the box de-selects and goes back to normal.

What actually happened was...:
After selecting the 'server adress field' and then clicking the field above the lower field doesn't deselect, so now both fields are selected. You can only write in the upper field but both are highlighted and has an underscore.

Steps to Reproduce:

From the Minecraft start screen:

1. Click 'Multiplayer'
2. Click 'Add Server' or 'Edit Server' after selecting a server
3. Click the bottom 'Server Adress' field
4. Click the upper 'Server Name' field