QmlDebug: Enable 'What are the prerequisites?' link in run configuration

DebuggerLanguageChooser is in utils, which is why we cannot directly open
the URL in the help plugin.

src/plugins/projectexplorer/customexecutableconfigurationwidget.cpp

@@ -37,6 +37,7 @@
 #include "project.h"
 #include "environmentwidget.h"
 
+#include <coreplugin/helpmanager.h>
 #include <utils/detailswidget.h>
 #include <utils/environment.h>
 #include <utils/pathchooser.h>
@@ -49,6 +50,7 @@
 #include <QtGui/QLabel>
 #include <QtGui/QLineEdit>
 
+
 namespace ProjectExplorer {
 namespace Internal {
 
@@ -166,6 +168,8 @@ CustomExecutableConfigurationWidget::CustomExecutableConfigurationWidget(CustomE
             this, SLOT(useQmlDebuggerToggled(bool)));
     connect(m_debuggerLanguageChooser, SIGNAL(qmlDebugServerPortChanged(uint)),
             this, SLOT(qmlDebugServerPortChanged(uint)));
+    connect(m_debuggerLanguageChooser, SIGNAL(openHelpUrl(QString)),
+            Core::HelpManager::instance(), SLOT(handleHelpRequest(QString)));
 
     connect(m_runConfiguration, SIGNAL(changed()), this, SLOT(changed()));