Replaces 'in world' arguments.

Arguments acquired from 'in world' cannot be GCd for several minutes due to a hidden reference from usr to the argument itself.
This replaces all 'in world' arguments with 'in range(world.view)', with the notable exception of "View Variables".

code/modules/admin/view_variables/view_variables.dm

@@ -6,6 +6,7 @@
 // Variables not to expand the lists of. Vars is pointless to expand, and overlays/underlays cannot be expanded.
 /var/list/view_variables_dont_expand = list("overlays", "underlays", "vars")
 
+// Acceptable 'in world', as VV would be incredibly hampered otherwise
 /client/proc/debug_variables(datum/D in world)
 	set category = "Debug"
 	set name = "View Variables"