Supported currency list consistency across instances

[benalleng]

Adding to the config.toml I noticed that all of the supported currencies are included in the order they are added to the list and then sats is appended at the end out of any order that may have been intended by the user. Additionally a user can add sats separately to the list and then see a duplicate sats on the list of currencies.

This issue is based on PR #124 where a discussion came up on how to best organize this input across all instances of Satsale for consistency

I am testing two possible fixes to adjust the user experience for this in config.py line 99

1.An iteration to appends sats if the user did not already input sats as a currency and then organizes the entire list alphabetically
2. Another iteration that organizes the list alphabetically as before but then places sats next to BTC to better demonstrate their relation to one another

[benalleng]

Would like some insight on how best to organize this input