release v.20.1

🗲FLASH WITH A BROWSER🗲

Features:

• spectrum attenuate, blacklist, normalize functions are now available in
  • channel mode
  • frequency mode
  • scan range mode
• there were a lot of confusion even for me with the different keybindings across different spectrum modes, so now key bindings are unified across all spectrum modes:
  • KEY FN1 blacklist
  • KEY FN2 attenuate
  • KEY 2 normalize
  • KEY 8 toggle backlight
• attenuate usage has been simplified so now it can be applied anytime to current peak bar
• spectrum attenuate, blacklist, normalize modifiers reset if we switch spectrum modes

Changes

• spectrum attenuate function doesn't work when there are more than 128x samples, so it cannot be activated in such case to prevent errors
• spectrum frequency change step adjustment with KEY 2 and KEY 8 has been removed and is now always auto-adjusted to half a spectrum bandwidth, and its display have been replaced with status indicators for blacklist and attenuate functions

Fixes:

• fixed messenger to work reliably with all the channel bandwidths
  • deviations for all the channel bandwidths have been calibrated
• 🎉 fix #106 by a new developer @T1MOXA who found the bug and submitted the first contributor pull request for this project 🎉

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🎉 Also shout out to @ErikS-web, who is doing a great job working on the Wiki! 🎉