PXX updates + optimizations pulled from er9x

FrSky TELEMETRY menu is now moved to [DOWN long]
Function added to reach the TELEMETRY screen when a switch is enabled
Main view optimizations

src/open9x.cpp

@@ -65,6 +65,8 @@ uint8_t heartbeat;
 
 int8_t safetyCh[NUM_CHNOUT];
 
+union ReusableBuffer reusableBuffer;
+
 const pm_char s_charTab[] PROGMEM = "_-.,";
 
 const pm_uint8_t bchout_ar[] PROGMEM = {
@@ -928,6 +930,16 @@ void resetTimer(uint8_t idx)
   s_timerVal_10ms[idx] = 0 ;
 }
 
+void resetAll()
+{
+  // TODO s_traceCnt to be reset?
+  resetTimer(0);
+  resetTimer(1);
+#ifdef FRSKY
+  resetTelemetry();
+#endif
+}
+
 static uint8_t lastSwPos[2] = {0, 0};
 static uint16_t s_cnt[2] = {0, 0};
 static uint16_t s_sum[2] = {0, 0};