In the Multiplayer screen, if you hover the 'Add server' button having a server under it, it will ignore the menu and display the list of players of this server. In my tests, I wasn't able to connect to the server or select it, just to pop up the list. Doesn't work only with the button; if you hover other places near the player number area, it will also display.

Steps to reproduce:
1- Add enough servers to fill the screen and show the scroll bar (at least six).
2- Adjust the scroll bar until a server is positioned under the 'Add server' button.
3- Hover the 'Add server' button until the player list of the server appears.