Major Release v1.2.0

### Major Releases v1.2.0

 1. Enable scan of WiFi networks for selection in Configuration Portal. Check [PR for v1.3.0 - Enable scan of WiFi networks #10](khoih-prog/WiFiManager_NINA_Lite#10). Now you can select optional **SCAN_WIFI_NETWORKS**, **MANUAL_SSID_INPUT_ALLOWED** to be able to manually input SSID, not only from a scanned SSID lists and **MAX_SSID_IN_LIST** (from 2-15)
 2. Fix invalid "blank" Config Data treated as Valid.
 3. Permit optionally inputting one set of WiFi SSID/PWD by using `REQUIRE_ONE_SET_SSID_PW == true`
 4. Enforce WiFi PWD minimum length of 8 chars
 5. Minor enhancement to not display garbage when data is invalid
 6. Fix issue of custom Blynk port (different from 8080 or 9443) not working on ESP32. Check [Custom Blynk port not working for BlynkSimpleEsp32_Async_WM.h #4](khoih-prog/Blynk_Async_WM#4)
 7. To permit auto-reset after configurable timeout if DRD/MRD or non-persistent forced-CP. Check [**Good new feature: Blynk.resetAndEnterConfigPortal() Thanks & question #27**](khoih-prog/Blynk_WM#27)
 8. Fix rare Config Portal bug not updating Config and dynamic Params data successfully in very noisy or weak WiFi situation
 9. Tested with [**Latest ESP32 Core 1.0.6**](https://github.com/espressif/arduino-esp32) for ESP32-based boards.
10. Update examples

src/BlynkSimpleEsp32_WFM.h

@@ -2317,6 +2317,9 @@ class BlynkWifi
 
         if (key == "" && value == "")
         {
+          // New from v1.2.0         
+          serverSendHeaders();
+
           String result;
           createHTML(result);