- Comment out TFTP server-related code and imports
- Remove TFTP server tab from the application
- Add global copy, paste, and cut keybindings for Text and Entry widgets
- Remove Firmware directory creation
- Add a new `send_login_password()` function to centralize login/password input logic
- Implement retry mechanism for both line and block command modes
- Add support for detecting and handling command errors (marked by '^' symbol)
- Limit retry attempts to 3 times for each command
- Improve logging and error reporting for command execution
- Update interactive command processing in SerialAppGUI to include retry logic
