#848 remember melee mags after skinchange and reveal objects

pulled from DayZ CE

https://github.com/dayz10k/DayzMod-Private/commit/657688a439fcc375853a3ec91d9ca6138583d5f5#diff-037f2fbb6c571dc6054b7fa36f624fdc

and 

https://github.com/dayz10k/DayzMod-Private/commit/4e1239bbdadac7dda5aa6badb7d2c6a7230cd206#diff-037f2fbb6c571dc6054b7fa36f624fdc