release v.16.5

🗲FLASH WITH A BROWSER🗲

Fixes:

• spectrum channel mode:
  • fixes a bug where last valid memory channel was phantom displayed, as it only appeared when its RSSI crossed the RSSI trigger line, now last channel is properly displayed
  • fixes a bug where last 200 channel was not being scanned
  • fixes a bug where random frequency would sometimes appear when scanning 200 channels
• fixes #39 battery calibration
• fixes #38 power settings reset after TX

Minor code changes:

• imported changes from:
  • @JuantAldea
  • @wutje