Laser-lock made visible, further nerf tank gun

Because if the tank can see you, you should be able to see its laser,
even if you can't see it.
friendly turrets use their full range

Because by the time the tankbot gets within range to use the tank
turret, its AI would only ever opt for the coaxial.  BUG.
Reduced lock-time

The tank cannon is designed to engage vehicles, and the 40mm primarily
vehicles or groups.

So now if you evade it, it'll need to regain lock sooner, thereby buying
you a bit more time.
Merge pull request #9719 from KA101/tanknerf

Nerf tank drones