Security and feature release!

🛡️ Security

• Introduced some checks to prevent de-authorized users from accessing menus they were forbidden from using (fe751cb)

✨ New features

• Added configuration option to disable cash payments (#190, Payments.Cash.enable_pay_with_cash)
• Added configuration option to disable admin transaction creation (#190, Payments.Cash.enable_create_transaction)

📔 Documentation

• Added warranty and liability disclaimer in the front page of the documentation

🔍 Full changelog