Allow more lobby parameters to be configured.

Content.Server/GameTicking/GameTickerCommands.cs

@@ -190,21 +190,7 @@ namespace Content.Server.GameTicking
 
             var ticker = IoCManager.Resolve<IGameTicker>();
 
-            Type presetType;
-            switch (args[0])
-            {
-                case "DeathMatch":
-                    presetType = typeof(PresetDeathMatch);
-                    break;
-                case "Sandbox":
-                    presetType = typeof(PresetSandbox);
-                    break;
-                default:
-                    shell.SendText(player, "That is not a valid game preset!");
-                    return;
-            }
-
-            ticker.SetStartPreset(presetType);
+            ticker.SetStartPreset(args[0]);
         }
     }
 }