[All] Code refactoring

- keys beep and haptic refactoring (not anymore audio events)
- trims move/mid/min/max refactoring (trim end splitted to trim min / trim max)
- S6R new alarms
- S6R servos/rx status displayed as a text (not an integer which has no sense)
- Timer countdown configuration
- The splash was not displayed (but the timeout was there) after the first calibration

radio/src/tests/timers.cpp

@@ -49,15 +49,10 @@ void timerSet(int idx, int16_t val)
 
 void initModelTimer(uint32_t idx, uint8_t mode, int16_t start = 0)
 {
+  memset(g_model.timers[0], 0, sizeof(g_model.timers[0]));
   g_model.timers[0].mode = mode;
   g_model.timers[0].start = start;
   g_model.timers[0].countdownBeep = COUNTDOWN_SILENT;
-  g_model.timers[0].minuteBeep = 0;
-  g_model.timers[0].spare = 0;
-#if defined(CPUARM) || defined(CPUM2560)
-  g_model.timers[0].persistent = 0;
-  g_model.timers[0].value = 0;
-#endif
 }
 
 /*