Sleepers now use NanoUI

Also cuts out a few points of weirdness; No dialysis on bloodless races
like IPCs, and dialysis on simple_animals is no longer possible through
the interface or through href twiddling, as that caused a runtime.

Also, prevents href tweaking to dispense chemicals the sleeper doesn't
have.

code/modules/mob/living/carbon/human/human_defines.dm

@@ -73,6 +73,7 @@
 	var/mob/remoteview_target = null
 	var/meatleft = 3 //For chef item
 	var/decaylevel = 0 // For rotting bodies
+	var/max_blood = 560 // For stuff in the vessel
 	var/slime_color = "blue" //For slime people this defines their color, it's blue by default to pay tribute to the old icons
 
 	var/check_mutations=0 // Check mutations on next life tick