Expand Mob Grief logging when target is not a player

[crash-ip21]

Mod currently doesn't log Mob Grief if the target is not a player but another mob or no target at all.
Example: Skeleton tries to shoot Iron Golem, but hits a Creeper, and it explodes.
Another example: Enderman removing/placing blocks.
There are no logs in these scenarios.

clip with of the first example