Make sure the "Auto Detect" button is enabled when the

"Use system proxy configuration" is selected.

Make sure users can simply click the Apply button after selecting the same
option under windows.

CCBUG: 291259
(cherry picked from commit a52df46f43)

konqueror/settings/kio/kproxydlg.cpp

@@ -219,7 +219,7 @@ static void setProxyInformation(const QString& value,
         } else {
             manEdit->setText(urlStr);
         }
-        
+
         if (spinBox && portNum > -1) {
             spinBox->setValue(portNum);
         }
@@ -252,6 +252,7 @@ KProxyDialog::KProxyDialog(QWidget* parent, const QVariantList& args)
     connect(mUi.systemProxyRadioButton, SIGNAL(toggled(bool)), mUi.systemProxyGroupBox, SLOT(setVisible(bool)));
 #else
     mUi.autoDetectButton->setVisible(false);
+    connect(mUi.systemProxyRadioButton, SIGNAL(clicked()), SLOT(slotChanged()));
 #endif
 
     // signals and slots connections

konqueror/settings/kio/kproxydlg.ui

@@ -123,9 +123,6 @@ Automatic detection is performed using the <b>Web Proxy Auto-Discovery Pro
    </item>
    <item row="4" column="3">
     <widget class="QPushButton" name="autoDetectButton">
-     <property name="enabled">
-      <bool>false</bool>
-     </property>
      <property name="whatsThis">
       <string>&lt;qt&gt;Attempt automatic discovery of the environment variables used for setting system wide proxy information.&lt;p&gt; This feature works by searching for commonly used variable names such as HTTP_PROXY, FTP_PROXY and NO_PROXY.&lt;/qt&gt;</string>
      </property>