Add M320 as a UGL

M320 with stock attached can be disassembled into stock and M320 GLM.
The GLM can be attached to rifles or used as a craft component alongside
the stock in making the stand-alone launcher.
Adjusts weight of bird and bug corpses.

I could have rolled this in with my last PR if I'd thought of it at the
time; hindsight being 20/20 and all that.
Fix 'You holster your none.' message
Restores missing hazmat_eyes item group.
Merge pull request #7014 from Rivet-the-Zombie/other-species-weight-fix

Adjusts weight of bird and bug corpses.
Merge pull request #7015 from TranquilMarmot/nonefix

Fix 'You holster your none.' message
Merge pull request #7018 from Rivet-the-Zombie/mask-silliness-fix

Restores missing hazmat_eyes item group.
elusive
cougar spawn
No more Zombear swarming.
Added tools and parts subsections to electronics category, moved all relevant recipes into new subsections and floodlight into lighting.
Merge pull request #6987 from dar-/m320-underbarrel

Add M320 as a underslung grenade launcher
Speed up construction menu, when checking if the player has the required components
Adding myself to SIGNOFF file
Merge pull request #7026 from Wishbringer/ZombearTweak

Spawn Zombears less often early in the game.
Merge pull request #7024 from Lain-/elusive-cougar

Elusive cougars
Renaming ELECTRONICS category to ELECTRICAL makes more sense.
Fix not being able to store bolts in quiver
Thanks for noticing @OzoneH3. :)
Merge pull request #7032 from TranquilMarmot/bolt_fix

Fix not being able to store bolts in quiver