[Feature] Change targets with camera stick

[puddydoo]

There should be a feature where if the player is locked on to a target when there are multiple targets, pressing a direction on the camera stick will change the current target, just like pressing Z in the "Switch" targeting mode. In turn, while this feature is enabled, Switch mode should be changed so that pressing Z while locked on to a target just totally disengages targeting instead of switching targets, which fixes the flaw that the way you're supposed to do this in the vanilla game by turning away from the targets is tricky. Giving the stick directional influence over what target gets switched to, like in modern action games, would be nice to have. But even if it didn't take direction into account and just reused the code of Switch mode it would be an improvement.