Suppress misleading warning message

QString::split() was giving a non-empty QStringList, and
that caused Session::setBannedIPs() to emit misleading warning message.

src/webui/api/appcontroller.cpp

@@ -483,7 +483,7 @@ void AppController::setPreferencesAction()
     if (hasKey("ip_filter_trackers"))
         session->setTrackerFilteringEnabled(it.value().toBool());
     if (hasKey("banned_IPs"))
-        session->setBannedIPs(it.value().toString().split('\n'));
+        session->setBannedIPs(it.value().toString().split('\n', QString::SkipEmptyParts));
 
     // Speed
     // Global Rate Limits

src/webui/webapplication.cpp

@@ -473,8 +473,8 @@ Http::Response WebApplication::processRequest(const Http::Request &request, cons
         header(QLatin1String(Http::HEADER_CONTENT_SECURITY_POLICY), m_contentSecurityPolicy);
 
     if (m_useCustomHTTPHeaders) {
-        for (const CustomHTTPHeader &i : asConst(m_customHTTPHeaders))
-            header(i.name, i.value);
+        for (const CustomHTTPHeader &customHeader : asConst(m_customHTTPHeaders))
+            header(customHeader.name, customHeader.value);
     }
 
     return response();