New button "STATS" for the MP Browser menu

[T-MaxWiese-T]

This makes the swat4stats website better known and it is helpful because sometimes not all servers are shown and additional information can be found on the website. And people who do not install the plugin for whatever reason have the possibility to access the servers via IP. I have also refined the URL for the master server patch download so that the relevant part is displayed immediately and the player is not confused with things he doesn't really understand. I know that I used to be a bit confused when I only saw the top part.