adds constants, cleans up callstd and msgbox code

* adds some constants for standard script names and messagebox types
* replaces some callstd calls with msgbox calls where equivalent
* replaces msgbox and callstd calls using raw digits with versions that use the constants

data/maps/SkyPillar_Top/scripts.inc

@@ -89,7 +89,7 @@ SkyPillar_Top_EventScript_239785:: @ 8239785
 	removeobject VAR_LAST_TALKED
 	fadescreenswapbuffers 0
 	bufferspeciesname 0, VAR_0x8004
-	msgbox gUnknown_08273204, 4
+	msgbox gUnknown_08273204, MSGBOX_DEFAULT
 	releaseall
 	end
 
@@ -124,7 +124,7 @@ SkyPillar_Top_EventScript_23979A:: @ 823979A
 	applymovement 1, SkyPillar_Top_Movement_23984B
 	waitmovement 0
 	removeobject 1
-	msgbox SkyPillar_Top_Text_239860, 4
+	msgbox SkyPillar_Top_Text_239860, MSGBOX_DEFAULT
 	closemessage
 	delay 20
 	fadeinbgm 1