hotfixing #425

this is a hotfix, there are numerous issues with this, development branch already addressed all of them.

WiFiManager.cpp

@@ -197,9 +197,20 @@ boolean WiFiManager::startConfigPortal() {
 }
 
 boolean  WiFiManager::startConfigPortal(char const *apName, char const *apPassword) {
-  //setup AP
-  WiFi.mode(WIFI_AP_STA);
-  DEBUG_WM(F("SET AP STA"));
+  
+  if(!WiFi.isConnected()){
+    WiFi.persistent(false);
+    // disconnect sta, start ap
+    WiFi.disconnect(); //  this alone is not enough to stop the autoconnecter
+    WiFi.mode(WIFI_AP);
+    WiFi.persistent(true);
+  } 
+  else {
+    //setup AP
+    WiFi.mode(WIFI_AP_STA);
+    DEBUG_WM(F("SET AP STA"));
+  }
+
 
   _apName = apName;
   _apPassword = apPassword;