Classic arenas sometime end too quickly

[aza547]

Currently we will end in 20s if a death happens and no follow up deaths.

We shouldn't do this if there is still combat in the game (i.e. spell/aura events in logs). I think that's a straight forward change to logic.

[aza547]

Also currently we start a timer for 20s from death to end the game.

That time should start from the log time of the death, not the time the death is seen (i.e. when the log is flushed to disk).