[jurgelenas]

Found on a real radio: changing RF Band right after the main page loaded, while the inner menus were still loading in the background, snapped it back to 868MHz.

crossfireTelemetryPush() returns false while the previous frame is still waiting to go out.
Writes ignored that, so a write made while fields were loading in the background
could be dropped. The tool then re-read the old value.

Writes now try once and go into the queue if the slot is busy; tick() only takes a
write off the queue once the push succeeds. The CRSF simulator mock now accepts only
one push per tick, like EdgeTX.

[github-actions]

Test build for 8ec300e

• Download: expresslrs-lua-pr50-8ec300e.zip (requires a GitHub login; extract it, then extract the inner zip onto the SD card root). The tools show version 8ec300e.
• Or install from source with: edgetx-cli pkg install ExpressLRS/Lua@fix-dropped-writes (shows version dev)

[CapnBry]

Ah yup, I saw this as well once and didn't look into it because it never happened again and I thought it was just me pushing the wrong button. This is the right way to manage it