Fixed tracer guns upgrade showing the HUD for all players

Hopefully fix weird stack overflow error

Upgraded banana bomb is now slower by default, and everyone can now see the banana bus through walls

Upgraded magneto stick now has double as strong struggles for the held player

pap_player_magneto_stick_struggle_reduce is now 1 by default, up from 0.5

B.O.B from the upgraded Viper Rifle is no longer invincible and now lasts for 15 seconds by default

Added better camo support for bonemerged weapons

Optimised the options menu to only save changed settings (thanks Mal!)

This allows for easier changing of default values for settings, and makes the settings file take much less space

Fixed role weapons button description in the F1 menu mentioning a button on the right, when y'know... the button's on the left lol

Added some optimisations to reading saved convars (Thanks Mal!)

Re-added saving settings changed via the F1 menu, via a new safer method! (Saving all convar values manually in a .json file)

Your old settings are reset, but you are now able to set them back!