* Use pwrCheck() as primary control point for shutdown, centralizes thread control in simpgmspace module;
* Remove main_thread_running in favor of separate variables for startup mode and shutdown flag;
* Don't start a thread for ARM startup, just run simuMain() directly (the thread just exits anyway);
* Refactor SIMU_SLEEP() macro, and remove all unnecessary uses of it, also remove SIMU_SLEEP_NORET;
* Add startType param to opentxStart() to control splash and startup checks;
* Fixes backlight never turning off in simulator with "SWITCH" power button type (pwrPressed() was always true);
* Fixes simu shutdown when model checklist is displayed at startup;
* Adds stubs to possibly simulate a "soft" power button in the future.
* Implement model note view without menu handler. Use it before pulse starts
* Also at model change. Handle wd reset and start pulses after mixer
* Fix Horus compile
* Fix Horus crash
* Fix coding style issue
* [firmware][ARM] Adjust some value limits for mix sources and update editing UI for LSs, CFs, & telem. bars:
* Increase timer limits to +/-8:59:59 when used with LSs, CFs, & bars;
* Increase Lua script output limits to +/-30K;
* Trim limits based on extended limit model setting;
* Limit TX voltage to 25.5;
* Limit TX time comparison value to 29:59m;
* Use proper GVar limits (user-configured), display precision, & unit in LSs & telem. bars;
* Display timer values properly with hours (instead of mmm:ss).
* [firmware] getTimerString() would fail with times >= 100min if hours weren't shown.
* Fix builds w/out GVars.
* Fix x7 display in telemetry widget (only time is displayed)
* rename drawDate to a more specific name, since it is not generic
fix for x9
* Travis build fix
* Introduce time FONTSIZE_MASK macro
* Cosmetics based on Bertrand's last feedbacks
3djc