Fixes: Add a button to show the qt version manager from the project settings page.

Task:     235982

src/plugins/coreplugin/coreimpl.cpp

@@ -190,3 +190,4 @@ void CoreImpl::openFiles(const QStringList &arguments)
 {
     m_mainwindow->openFiles(arguments);
 }
+

src/plugins/qt4projectmanager/qt4buildconfigwidget.cpp

@@ -38,6 +38,9 @@
 #include "qt4project.h"
 #include "qt4projectmanager.h"
 #include "ui_qt4buildconfigwidget.h"
+#include <extensionsystem/pluginmanager.h>
+#include <coreplugin/mainwindow.h>
+#include "qt4projectmanagerconstants.h"
 
 #include <QtGui/QFileDialog>
 
@@ -76,9 +79,11 @@ Qt4BuildConfigWidget::Qt4BuildConfigWidget(Qt4Project *project)
     connect(m_ui->importLabel, SIGNAL(linkActivated(QString)),
             this, SLOT(importLabelClicked()));
 
+    connect(m_ui->manageQtVersionPushButtons, SIGNAL(clicked()),
+            this, SLOT(manageQtVersions()));
+
     connect(m_pro->qt4ProjectManager()->versionManager(), SIGNAL(qtVersionsChanged()),
             this, SLOT(setupQtVersionsComboBox()));
-
 }
 
 Qt4BuildConfigWidget::~Qt4BuildConfigWidget()
@@ -86,6 +91,13 @@ Qt4BuildConfigWidget::~Qt4BuildConfigWidget()
     delete m_ui;
 }
 
+void Qt4BuildConfigWidget::manageQtVersions()
+{
+    Core::ICore *core = ExtensionSystem::PluginManager::instance()->getObject<Core::ICore>();
+    core->showOptionsDialog(Constants::QT_CATEGORY, Constants::QTVERSION_PAGE);
+}
+
+
 QString Qt4BuildConfigWidget::displayName() const
 {
     return tr("General");

src/plugins/qt4projectmanager/qt4buildconfigwidget.h

@@ -64,6 +64,7 @@ private slots:
     void shadowBuildLineEditTextChanged();
     void importLabelClicked();
     void qtVersionComboBoxCurrentIndexChanged(const QString &);
+    void manageQtVersions();
 
 private:
     Ui::Qt4BuildConfigWidget *m_ui;

src/plugins/qt4projectmanager/qt4buildconfigwidget.ui

@@ -61,6 +61,13 @@
          </property>
         </widget>
        </item>
+       <item>
+        <widget class="QPushButton" name="manageQtVersionPushButtons">
+         <property name="text">
+          <string>Manage Qt Versions</string>
+         </property>
+        </widget>
+       </item>
        <item>
         <widget class="QLabel" name="invalidQtWarningLabel">
          <property name="text">