Extended Castle Siege/Arka event by reward issued to Guild Master of participating guild

Allow to reward issued to Guild Master of participating guilds (instead just winner) when event ends (if that guild participated in the battle). 
 

Reason:

This new feature is awesome, we thanks IGCN for this but we want to promote PvP events participation even if you don't manage (or cannot) win. The most powerful guild/ally will have the arka buff or castle siegue lord mix/land of trial reward motivation, but others at least could get a participation reward instead (which this new feature adds).

Instead of giving more rewards to the strongest guild, we can give rewards to other guilds (or all) that participate in PvP events. Being a guild master and knowing you likely won win but still manage to motivate players to participate in those events should be compensated.

The functionality is just right there, just need a bit of direction! Thanks.