The server Browser history should show the last login time on the servers like dayzcommander did. And maybe not temporary delete servers from the history when not reachable (could be marked in another color though)

The sorting is from what i figured last server you where connected on the bottom and the oldest on the top. However servers are removed during their downtime so if a server is restarted and you want to find the last one you where playing on it can get quite confusing. Giving the last logon time and marking unresponsive servers with another color would improve.