Code and Map Bugfixes (#4514)

- Access to Research Division Maintenance airlock is fixed #4477 
- Changed shower to wash any mob present on active shower tile, also added damage to slimes. #4483 
- Added missing emergency firelocks in interstatial level of security. #4444 
- Fixed wrong spelling of broken light  bulb icon state, issue #4541 
- Added for pool to use reagents water on mobs or objects, now pool cleans itself and user, plus damages slimes. #4544 #4545 
- `crush_act` now checks if atom is simulated. #4001 
- turbolifts now use `crush_act` on atoms.
- Closets have their own crush_act. They now gib mobs inside of them. issue #4538
- Closets uses its internal function to dump content upon destruction.
- Closet now spawn one sheet of steel when destroyed.
- Fixed chainsaw unwielded force to be appropriate. Buffed chainsaw on wielded/unwielded force. Wielded is now `60` and unwielded is `30` if it is powered. #4586 
- Added missing cameras to medical construction level. #4581 
- Hydroponics tray status no longer blocked by light fixture, moved it in a better spot. Added one more light to hydroponics to not have shadows. #4449

code/game/objects/items/weapons/material/twohanded.dm

@@ -317,6 +317,7 @@
 	base_icon = "chainsaw_off"
 	flags = CONDUCT
 	force = 10
+	force_unwielded = 10
 	force_wielded = 20
 	throwforce = 5
 	w_class = ITEMSIZE_LARGE
@@ -361,8 +362,9 @@
 	var/turf/T = get_turf(src)
 	T.audible_message(span("notice", "\The [src] rumbles to life."))
 	playsound(src, "sound/weapons/chainsawstart.ogg", 25, 0, 30)
-	force = 20
-	force_wielded = 40
+	force = 15
+	force_unwielded = 30
+	force_wielded = 60
 	throwforce = 20
 	icon_state = "chainsaw_on"
 	base_icon = "chainsaw_on"