[SSD1306] Give some time for the flash to start (#1571)

Before reading the preferences, the goal is to avoid getting stuck during preferences reading operations

main/ZdisplaySSD1306.ino

@@ -175,6 +175,7 @@ void MQTTtoSSD1306(char* topicOri, JsonObject& SSD1306data) { // json object dec
     // save, load, init, erase
     if (SSD1306data.containsKey("save") && SSD1306data["save"]) {
       SSD1306Config_save();
+      success = true;
     } else if (SSD1306data.containsKey("load") && SSD1306data["load"]) {
       success = SSD1306Config_load();
       if (success) {

main/main.ino

@@ -761,6 +761,7 @@ void setup() {
   SetupIndicators(); // For RGB Leds
 
 #if defined(ESP8266) || defined(ESP32)
+  delay(100); //give time to start the flash and avoid issue when reading the preferences
 #  ifdef ESP8266
 #    ifndef ZgatewaySRFB // if we are not in sonoff rf bridge case we apply the ESP8266 GPIO optimization
   Serial.end();