Simplify gSchedulePowerSave logic

There was quite convoluted logic there, and what I believe, was a bug.

Rationale:

Both,
- gBatterySaveCountdown_10ms = battery_save_count_10ms;, and
- gSchedulePowerSave = false
are always executed inside FUNCTION_Select().

So the code is equivalent to:

if (any of those OR'd) {
	gBatterySaveCountdown_10ms = battery_save_count_10ms;
	gSchedulePowerSave = false; (but only if we have NOAA disabled)
} else {
	[other stuff from FUNCTION_Select()]
	gBatterySaveCountdown_10ms = battery_save_count_10ms;
	gSchedulePowerSave = false; (regarless of having NOAA or not)
}

So:
- OR is true, have NOAA-> don't clear gSchedulePowerSave
	-> implies we will enter here, again, until the OR is false, but only if we have NOAA.
- OR is False -> clear gSchedulePowerSave.

Moreover, checking with DualTachyon code at
https://github.com/DualTachyon/uv-k5-firmware/blob/6f8afac8864e0349ecf8b10f91ce8f69273013db/app/app.c#L747
gSchedulePowerSave is always set to false if it was true.

app/app.c

@@ -926,46 +926,35 @@ void APP_Update(void)
 #endif
 
 	if (gSchedulePowerSave) {
-		if (gPttIsPressed                     ||
-		    gKeyBeingHeld                     ||
-			gEeprom.BATTERY_SAVE == 0         ||
-		    gScanStateDir != SCAN_OFF         ||
-		    gCssBackgroundScan                ||
-		    gScreenToDisplay != DISPLAY_MAIN
+		if (gPttIsPressed
+			|| gKeyBeingHeld
+			|| gEeprom.BATTERY_SAVE == 0
+			|| gScanStateDir != SCAN_OFF
+			|| gCssBackgroundScan
+			|| gScreenToDisplay != DISPLAY_MAIN
 #ifdef ENABLE_FMRADIO
 			|| gFmRadioMode
 #endif
 #ifdef ENABLE_DTMF_CALLING
 			|| gDTMF_CallState != DTMF_CALL_STATE_NONE
 #endif
-		){
-			gBatterySaveCountdown_10ms   = battery_save_count_10ms;
-		}
-		else
 #ifdef ENABLE_NOAA
-		if ((!IS_NOAA_CHANNEL(gEeprom.ScreenChannel[0]) && !IS_NOAA_CHANNEL(gEeprom.ScreenChannel[1])) || !gIsNoaaMode)
+			|| (gIsNoaaMode && (IS_NOAA_CHANNEL(gEeprom.ScreenChannel[0]) || IS_NOAA_CHANNEL(gEeprom.ScreenChannel[1])))
 #endif
-		{
-			//if (gCurrentFunction != FUNCTION_POWER_SAVE)
-				FUNCTION_Select(FUNCTION_POWER_SAVE);
-		}
-#ifdef ENABLE_NOAA
-		else
-		{
+		) {
 			gBatterySaveCountdown_10ms = battery_save_count_10ms;
+		} else {
+			FUNCTION_Select(FUNCTION_POWER_SAVE);
 		}
-#else
+
 		gSchedulePowerSave = false;
-#endif
 	}
 
-
 	if (gPowerSaveCountdownExpired && gCurrentFunction == FUNCTION_POWER_SAVE
 #ifdef ENABLE_VOICE
 		&& gVoiceWriteIndex == 0
 #endif
-	)
-	{
+	) {
 		static bool goToSleep;
 		// wake up, enable RX then go back to sleep
 		if (gRxIdleMode)