allies attack walls endlessly even after being untargeted

[Former user]

walking around carelessly and bumping into walls with burrowing claws can get very annoying with followers especially in places like sultan sites where all the walls have tons of armor and I have to spend a bunch of turns trying to kill the wall just so Oboroqoru will stop flying into rages endlessly trying to destroy it

[Ashe]

Dupe of #1833.