Tram Mk. IV hotfixes [NO GBP] (#73243)

## About The Pull Request
Fixes some little issues in
https://github.com/tgstation/tgstation/pull/73057

- tram doors only crush people if either emagged (100%) or
malfunctioning (15%)
- emag works on tram doors
- crossing signals use correct amount of power, increased brightness
- crossing signals and destination signs consume power when idle
- green static crossing signal shuts off when power lost
- left/right emag icons are swapped
- tram bench override shouldn't override all benches | Fixes
https://github.com/tgstation/tgstation/issues/73250
- reduced damage from tram door crushing (60 > 45)

## Changelog
🆑 LT3
fix: Fixed motion sensors on tram doors, they will now crush you much
less often!
balance: Reduced damage from being crushed by tram doors
code: Un-nested emag blacklist
code: emag works properly on tram doors
fix: Backwards tram door sparks animation
fix: Tram displays power consumption
fix: Tram crossing signals power consumption
balance: Increased brightness on tram crossing signals
fix: West Wing NW/SW and East Wing NE/SE crossing signals now shut off
when power is lost
fix: Tram benches don't override standard benches
fix: Reduced saturation and brightness of standard bench
/🆑

---------

Co-authored-by: Zephyr <12817816+ZephyrTFA@users.noreply.github.com>

code/game/objects/structures/beds_chairs/sofa.dm

@@ -100,27 +100,23 @@ COLORED_SOFA(/obj/structure/chair/sofa, maroon, SOFA_MAROON)
 	desc = "Perfectly designed to be comfortable to sit on, and hellish to sleep on."
 	icon_state = "bench_middle"
 	greyscale_config = /datum/greyscale_config/bench_middle
-	greyscale_colors = "#00CCFF"
+	greyscale_colors = "#2E668A"
 
 /obj/structure/chair/sofa/bench/left
 	icon_state = "bench_left"
 	greyscale_config = /datum/greyscale_config/bench_left
-	greyscale_colors = "#00CCFF"
 
 /obj/structure/chair/sofa/bench/right
 	icon_state = "bench_right"
 	greyscale_config = /datum/greyscale_config/bench_right
-	greyscale_colors = "#00CCFF"
 
 /obj/structure/chair/sofa/bench/corner
 	icon_state = "bench_corner"
 	greyscale_config = /datum/greyscale_config/bench_corner
-	greyscale_colors = "#00CCFF"
 
 /obj/structure/chair/sofa/bench/solo
 	icon_state = "bench_solo"
 	greyscale_config = /datum/greyscale_config/bench_solo
-	greyscale_colors = "#00CCFF"
 
 /obj/structure/chair/sofa/bench/post_buckle_mob(mob/living/Mob)
 	if(src.dir == EAST || WEST)