Qt: messages: Use std button for close button

modules/gui/qt4/dialogs/messages.cpp

@@ -78,6 +78,8 @@ MessagesDialog::MessagesDialog( intf_thread_t *_p_intf)
 
     /* Build Ui */
     ui.setupUi( this );
+    ui.bottomButtonsBox->addButton( new QPushButton( qtr("&Close"), this ),
+                                         QDialogButtonBox::RejectRole );
     updateTree();
 
     /* Modules tree */

modules/gui/qt4/ui/messages_panel.ui

@@ -111,7 +111,7 @@
    <item>
     <widget class="QDialogButtonBox" name="bottomButtonsBox">
      <property name="standardButtons">
-      <set>QDialogButtonBox::Close</set>
+      <set>QDialogButtonBox::NoButton</set>
      </property>
     </widget>
    </item>