Set defaults to powersaving_enabled=1 and radio_fem_rxgain=0 for fresh installs

examples/simple_sensor/SensorMesh.cpp

@@ -773,10 +773,13 @@ SensorMesh::SensorMesh(mesh::MainBoard& board, mesh::Radio& radio, mesh::Millise
   _prefs.gps_enabled = 0;
   _prefs.gps_interval = 0;
   _prefs.advert_loc_policy = ADVERT_LOC_PREFS;
-  _prefs.radio_fem_rxgain = 1;
+  _prefs.radio_fem_rxgain = 0; // PowerSaving and better signal
   _prefs.radio_fem_txgain = 0;
 
   memset(default_scope.key, 0, sizeof(default_scope.key));
+
+  // PowerSaving defaults
+  _prefs.powersaving_enabled = 1;
 }
 
 void SensorMesh::begin(FILESYSTEM* fs) {