Rename movobjectoffscreen to copyobjectxytoperm

Renaming the command to something that makes more sense as to what the command actually does. The command copies the current xy of the instantiated object back to its template, so that the object remains in the same place if the player walks away and despawns the object, and then comes back. "moveobjectoffscreen" implies that it might be taking the object and moving it physically to an off-screen location somehow.

data/maps/RustboroCity/scripts.inc

@@ -494,7 +494,7 @@ RustboroCity_EventScript_1E0B2E:: @ 81E0B2E
 	call_if_eq RustboroCity_EventScript_1E0BF3
 	setflag FLAG_INTERACTED_WITH_DEVON_EMPLOYEE_GOODS_STOLEN
 	setvar VAR_RUSTBORO_CITY_STATE, 3
-	moveobjectoffscreen 9
+	copyobjectxytoperm 9
 	msgbox RustboroCity_Text_1E183E, MSGBOX_DEFAULT
 	releaseall
 	end