[WiFi] Increase delay after turning on WiFi

See also letscontrolit#2886
This does make sure the initial network connection can transfer data.
On some nodes it took a lot of attempts to get a connection established right after boot.

src/ESPEasyWifi.ino

@@ -470,7 +470,7 @@ void setWifiMode(WiFiMode_t wifimode) {
     #endif // ifdef ESP8266
     delay(1);
   } else {
-    delay(30); // Must allow for some time to init.
+    delay(100); // Must allow for some time to init.
   }
   bool new_mode_AP_enabled = WifiIsAP(wifimode);