1. Optimize and improve the keyboard
2. Bug fixes

Add 4 new color themes:
- Retro (Black background & green text)
- HaX0R_GR33N (Black background & green text)
- HaX0R_BLUE (Black background & blue text)
- HaX0R_R3D (Black background & red text)

1. New feature: telnet server
2. Support automatically reconnecting to the Bluetooth device after it has been disconnected
3. Bug fixes and stability improvements

1. Support custom fonts
2. Support color themes
3. Support backspace key mapping

1. Support multiple tabs. You can open multiple terminals and connect multiple devices in AirTerminal 2.0.
2. Support split screen.

1. Support hiding Bluetooth devices without names,
2. Support three line break modes: CR, LF, and CRLF.

1. Add scrolling support to terminal
2. Minor bug fixes

1. Support logging terminal output to files
2. UI improvements

NEW:
- XMODEM support: send or receive files with XMODEM/XMODEM-1K protocol
- Add 3 new terminal working modes: Normal, Local Echo, Line Mode

FIXED:
- Improved compatibility with some BLE devices

Fixed AirTerminal connect to BLE devices in Central mode.