Potential fix for empty subtitles in 1.18 on <=1.15 servers

Signed-off-by: Lixfel <agga-games@gmx.de>

FightSystem_Core/src/de/steamwar/fightsystem/utils/FightUI.java

@@ -232,7 +232,7 @@ public class FightUI {
         }
         Message message = queue.poll();
 
-        Bukkit.getOnlinePlayers().forEach(p -> WorldOfColorWrapper.impl.sendTitle(p, "", FightSystem.getMessage().parse(message.getMsg(), p, message.getParams()), 5, 40, 5));
+        Bukkit.getOnlinePlayers().forEach(p -> WorldOfColorWrapper.impl.sendTitle(p, " ", FightSystem.getMessage().parse(message.getMsg(), p, message.getParams()), 5, 40, 5));
         Bukkit.getScheduler().runTaskLater(FightSystem.getPlugin(), FightUI::printSubtitle, 50);
         subtitleScheduled = true;
     }