Erase NVS as part of factory reset & new triple click behavior.

src/mesh/NodeDB.cpp

@@ -23,6 +23,7 @@
 #include "mesh/http/WiFiAPClient.h"
 #include "plugins/esp32/StoreForwardPlugin.h"
 #include <Preferences.h>
+#include <nvs_flash.h>
 #endif
 
 NodeDB nodeDB;
@@ -86,6 +87,7 @@ bool NodeDB::resetRadioConfig()
     if (radioConfig.preferences.factory_reset) {
         DEBUG_MSG("Performing factory reset!\n");
         installDefaultDeviceState();
+        nvs_flash_erase();
         didFactoryReset = true;
     }