big bundle of changes.

* reorganize templates even more (and a small layout break)
* rename wallets.hash and accounts.userhash to id
* refactor /wallets so it's idempotent for each param combination
* many small changes

LNbits/helpers.py

@@ -1,5 +0,0 @@
-import hashlib
-
-
-def encrypt(string: str):
-    return hashlib.sha256(string.encode()).hexdigest()