Boomerang weapon code cleanup

Updated randomat base

Added fallback role colour to role overlay in "Welcome back to TTT!" randomat

Fixed usage of replicated convar in "first come, first served"

Changes to be compatible with upcoming CR replicated convars update

Fixed lua error with 'My planet needs me' randomat

Fixed "Don't skip leg day" randomat not resetting players view height properly sometimes

- Added some more forced props to the "Prop confusion" randomat if you are using certain playermodels
- Fixed props being in the ground

Updated randomat base

"Unconventional healing" now ignores damage from map hazards and displays a message if killed by fire, explosion or fall damage from one, to prevent healing softlocks