Fix adding of raid timer multiple times in Raids

Fix adding timer multiple times when you change option while inside
raids.

Signed-off-by: Tomas Slusny <slusnucky@gmail.com>

runelite-client/src/main/java/net/runelite/client/plugins/raids/RaidsPlugin.java

@@ -320,9 +320,12 @@ public class RaidsPlugin extends Plugin
 		}
 
 		if (inRaidChambers && config.raidsTimer())
+		{
+			if (!infoBoxManager.getInfoBoxes().contains(timer))
 			{
 				infoBoxManager.addInfoBox(timer);
 			}
+		}
 		else
 		{
 			infoBoxManager.removeInfoBox(timer);