Brick-SDR 1.3.4_dev (digital modes: test build)

Development build 1.3.4_dev. Needs checking and testing: the digital modes added in this build (DIGI menu).

New and untested in real operation:

• RTTY and CW terminals (docked under the panadapter, or Pop out): decoding of real stations, transmit, macros.
  CW decoder follows the strongest tone near the pitch (tested on a synthetic signal only, no real CW station was heard).
• FreeDV RADE: receive and transmit, FreeDV strip under the panadapter and the settings window, FreeDV Reporter,
  RADE overlay on the panadapter, RADE readings for meter containers. Transmit was tested into the load only; real RADE
  traffic and the Reporter connection were not tested.
• RTTY mark/space markers on the panadapter.
• Tuning step follows the mode: LSB/USB 500 Hz, CW and digital 10 Hz, AM/FM 1 kHz.
• Leaving a digital mode (to SSB) switches RADE off and closes the terminal / strip.

Please report problems in the Brick SDR Telegram channel or as an issue.