Artillery turret crosshairs should blink when fullfilled

[chris13524]

The issue is once a shell is fired, the cross hairs disappear. This makes it difficult to tell what's going to be hit and what's not.

I suggest that once a target request has been fulfilled, the cross hairs should blink (or change colour or something) to indicate that a round is on it's way. And only once the round has exploded do the cross hairs disappear.