It would be nice if there was an option to either Archive an Envelope or hide the envelope. Reason for it is I have an envelope that I don't use anymore and don't need to see on a regular basis but I don't want to delete the envelope just in case I ever want to go back and reference it.
We just wanted to update you that we just released an update the delete functionality on the web app today that may help you. When you delete envelopes and accounts you no longer need, you can still filter for them in the Advanced Search and see your spending for deleted envelopes and accounts in your reports.
Note that you cannot, however, undo deleting an envelope or account.