Viewmodel from multi-class weapons not updated properly when class changed

[FortyTwoFortyTwo]

If client's class were to change while alive, multi-class weapons would still use previous class stuffs for viewmodel, reloading etc. This issue caused client crash if playing as sniper using grappling hook or spellbook with previous class stuff.

RobotArm in config was a temporary fix for sniper crash, see if there a better way to fix this without needing to delete and regenerate weapons.

[FortyTwoFortyTwo]

Sniper crash has been fixed from one of the TF2 update