[ENHANCEMENT] Edit HandleWalletFunctions.__keyring to use AES encryption/decryption

[freQniK]

Currently in v2.2.0 the seed phrase of a newly created wallet is stored encrypted with AES-256 in the config directory. However, the keyring.cfg can have the private key easily extracted using a script I created. It would be best to alter __keyring to decrypt the keyring.cfg file which was encyrpted with the aes helper. This way the keyring rejects attacks at extracting the private key from previous scripts.