Qt: Forgotten native separators in open panel (cosmetic) and in preferences.

Should repair skins options.

modules/gui/qt4/components/open_panels.cpp

@@ -408,7 +408,7 @@ void DiscOpenPanel::browseDevice()
     QString dir = QFileDialog::getExistingDirectory( 0,
             qtr( I_DEVICE_TOOLTIP ) );
     if (!dir.isEmpty()) {
-        ui.deviceCombo->setEditText( dir );
+        ui.deviceCombo->setEditText( toNativeSeparators( dir ) );
     }
     updateMRL();
 }

modules/gui/qt4/components/preferences_widgets.cpp

@@ -337,7 +337,7 @@ void DirectoryConfigControl::updateField()
                       QFileDialog::ShowDirsOnly |
                         QFileDialog::DontResolveSymlinks );
     if( dir.isNull() ) return;
-    text->setText( dir );
+    text->setText( toNativeSeparators( dir ) );
 }
 
 #if 0