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/simpgmspace.cpp

@@ -74,6 +74,8 @@ void *eeprom_write_function(void *)
     
     if (eepromFile) {
       fp = fopen(eepromFile, "r+");
+      if (!fp)
+        fp = fopen(eepromFile, "w+");
       assert(fp);
     }