Make the Arcane Amplification Drone always friendly

[Velorien]

At the moment, the Arcane Amplification Drone turns hostile after you damage it. A minor QoL change would be for it to stay friendly so you can rest next to it after an encounter instead of waiting for it to disappear/going outside LoS.

[Erenion]

It is always hostile for the simple reason that an Archmage with Spellcraft or any other class with spells that don't friendly fire can actually damage the drone, since it would otherwise be useless for them.

(also it lets you break skills that require you to be in combat)