Port xconfig to Qt5 - on Back clicked, deselect old item.

Signed-off-by: Boris Barbulovski <bbarbulovski@gmail.com>
Signed-off-by: Thiago Macieira <thiago.macieira@intel.com>
Signed-off-by: Michal Marek <mmarek@suse.com>

scripts/kconfig/qconf.cc

@@ -1618,14 +1618,16 @@ void ConfigMainWindow::listFocusChanged(void)
 
 void ConfigMainWindow::goBack(void)
 {
-	ConfigItem* item;
+	ConfigItem* item, *oldSelection;
 
 	configList->setParentMenu();
 	if (configList->rootEntry == &rootmenu)
 		backAction->setEnabled(false);
 	item = (ConfigItem*)menuList->selectedItems().first();
+	oldSelection = item;
 	while (item) {
 		if (item->menu == configList->rootEntry) {
+			oldSelection->setSelected(false);
 			item->setSelected(true);
 			break;
 		}