Fix name field id and datestamp field size

Author: LogicalJoe

app.src

@@ -36,9 +36,9 @@ app:
 	db	$81,$12,$13,$0f
 	db	$81,$2d,lengthof __app_version + 1,__app_version,$00
 	db	$81,$32,$59,$00
-	db	$81,lengthof __app_name,__app_name
+	db	$81,$40 or lengthof __app_name,__app_name
 	db	$81,$a1,$07
-	db	$03,$26,$09,$00
+	db	$03,$26,$09,$04
 	db	$21,$bb,$6e,$dc
 .freespace := 247 - ($-app.start)
 	db	$00,$0d,.freespace