A couple more fixes (#7302)

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## About The Pull Request

- You can now deactive a life crystal by using it in your hand. This is
permanent (it breaks it), since not being able to reuse them seems to be
intentional according to a code comment.
- Ghosts can no longer interact with the coffeemaker.
- Blood splatters from bleeding now correctly use a species' blood color
(or custom blood color for custom species).

## Why It's Good For The Game

The life crystal one is arguably very QOL for people who use them but
want to take off their uniforms for whatever reason. Blood color is also
a nice touch for people who use custom blood colors for their species
(or really, for any species that doesn't use the usual blood color). The
other is a simple bugfix.

## Changelog

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🆑
add: You can now deactivate a life crystal by using it in your hand.
fix: Ghosts can no longer brew coffee.
fix: Bleeding now respects a species' blood color (including custom
blood color).

/🆑

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code/modules/reagents/chemistry/reagents/blood/blood_holder.dm

@@ -154,7 +154,7 @@
 	if(!total)
 		return null
 	amount = min(amount, total)
-	if(amount <= 0) return null
+	if(amount < 0) return null
 	var/multiplier = max(0, 1 - (amount / total))
 
 	var/datum/blood_mixture/creating = new

code/modules/reagents/machinery/coffeemaker.dm

@@ -279,6 +279,8 @@
 /obj/machinery/coffeemaker/ui_interact(mob/user) // The microwave Menu //I am reasonably certain that this is not a microwave //I am positively certain that this is not a microwave
 	. = ..()
 
+	if(!can_interact(user) || !user.canUseTopic(src, !issilicon(user)))
+		return FALSE
 	if(brewing)
 		return