[all] Issue 17 fixed (lowercase is now the default)

[all] Issue 28 fixed (10 beeps on countdown during the last 10 seconds)
[all] Issue 37 fixed (Pwr+) added
[all] Issue 39 fixed (Potscroll too slow)
[Taranis] Bug with delays on 3 states switches
[Taranis/sky9x/gruvin9x] Date & Time not always saved

src/audio_arm.cpp

@@ -79,7 +79,6 @@ const char * audioFilenames[] = {
   "mixwarn1",
   "mixwarn2",
   "mixwarn3",
-  "timerlt3",
   "timer10",
   "timer20",
   "timer30",
@@ -825,14 +824,10 @@ void audioEvent(uint8_t e, uint8_t f)
         case AU_MIX_WARNING_3:
           audioQueue.play(BEEP_DEFAULT_FREQ+112, 12, 8, PLAY_REPEAT(2));
           break;
-        // time <3 seconds left
-        case AU_TIMER_LT3:
+        // time <= 10 seconds left
+        case AU_TIMER_LT10:
           audioQueue.play(BEEP_DEFAULT_FREQ+10, 30, 6, PLAY_NOW);
           break;
-        // time 10 seconds left
-        case AU_TIMER_10:
-          audioQueue.play(BEEP_DEFAULT_FREQ, 30, 6, PLAY_NOW);
-          break;
         // time 20 seconds left
         case AU_TIMER_20:
           audioQueue.play(BEEP_DEFAULT_FREQ, 30, 6, PLAY_REPEAT(1)|PLAY_NOW);