[MIRROR] Adds defines for mouse_opacity (#2381)

* Adds defines for mouse_opacity

* Delete misc.dm.rej

* Update misc.dm

code/game/machinery/hologram.dm

@@ -292,7 +292,7 @@ Possible to do for anyone motivated enough:
 			Hologram.Impersonation = user
 
 		Hologram.copy_known_languages_from(user,replace = TRUE)
-		Hologram.mouse_opacity = 0//So you can't click on it.
+		Hologram.mouse_opacity = MOUSE_OPACITY_TRANSPARENT//So you can't click on it.
 		Hologram.layer = FLY_LAYER//Above all the other objects/mobs. Or the vast majority of them.
 		Hologram.anchored = TRUE//So space wind cannot drag it.
 		Hologram.name = "[user.name] (Hologram)"//If someone decides to right click.

code/game/machinery/shieldgen.dm

@@ -58,7 +58,7 @@
 	desc = "A weak shield summoned by cultists to protect them while they carry out delicate rituals"
 	color = "#FF0000"
 	max_integrity = 20
-	mouse_opacity = 0
+	mouse_opacity = MOUSE_OPACITY_TRANSPARENT
 
 /obj/structure/emergency_shield/invoker/emp_act(severity)
 	return