fix: load user data for editing Invoice and TemporaryInvoice panels

• Loaded user lock information to enhance usability in Invoice and TemporaryInvoice panels.
• Ensured more meaningful user data for lock notification messages.
• Renamed functions and aligned code for better readability.
• Refined dependency loading in unlock panel function to increase stability.
• Added 'Users' dependency for user information retrieval.

Related: pcsg/buero#488