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/scripts/secret_power_tm.inc

@@ -36,10 +36,10 @@ Route111_Text_27659D: @ 827659D
 Route111_EventScript_2765FF:: @ 82765FF
 	lock
 	faceplayer
-	msgbox Route111_Text_2762C9, 5
+	msgbox Route111_Text_2762C9, MSGBOX_YESNO
 	compare VAR_RESULT, 1
 	goto_eq Route111_EventScript_27661E
-	msgbox Route111_Text_27655C, 4
+	msgbox Route111_Text_27655C, MSGBOX_DEFAULT
 	release
 	end
 
@@ -47,7 +47,7 @@ Route111_EventScript_27661E:: @ 827661E
 	giveitem_std ITEM_TM43
 	compare VAR_RESULT, 0
 	goto_eq Route111_EventScript_276680
-	msgbox Route111_Text_27636E, 4
+	msgbox Route111_Text_27636E, MSGBOX_DEFAULT
 	closemessage
 	setflag FLAG_0x060
 	clearflag FLAG_HIDE_SLATEPORT_CITY_TM_SALESMAN
@@ -72,7 +72,7 @@ Route111_EventScript_276675:: @ 8276675
 	return
 
 Route111_EventScript_276680:: @ 8276680
-	msgbox Route111_Text_27659D, 4
+	msgbox Route111_Text_27659D, MSGBOX_DEFAULT
 	release
 	end