Improvements for the leaderboard

• Adopt the design of the memberlist: the color of the own nickname is changing, the other ones are the same as in the leaderboard.

• format the time for each player: Use ',' instead of '.' and but a blank between the 's' and the time stamp. The time format should be like this: "00.00 s". Make sure every time stamp got two numbers after the decimal-comma.

• Display the "show more"-Button just in case we got more members than the content can hold.