comment updates

core/models/survex.py

@@ -269,6 +269,7 @@ class Wallet(models.Model):
         ticks = {}
         
         # Initially, are there any required survex files present ?
+        # Note that we can't set the survexblock here on the wallet as that info is only available while parsing the survex file
         survexok = "red"
         ticks["S"] = "red"
         if waldata["survex not required"]: