suppress network string error (#1325)

if parts are deactivated, instead use part label's SetError function to tell users about it instead

and two minor fixes on damage zone

reorder functions

Update parts.lua

localize variable
remove unused function
raise scope of local functions

fix pac camera when closing editor

localize function

localize variables

localize functions

Update net_combat.lua

localize functions
remove unused functions
limit some commands and the lock break net message

rename preset's table name

rename presets