- Moved all_tab to parent class

- Fixed memory leak for all_tab

src/searchEngine.h

@@ -56,6 +56,7 @@ class SearchEngine : public QWidget, public Ui::search_engine{
     QStringList enabled_engines;
     QTimer *searchTimeout;
     SearchTab *tab_search;
+    QList<SearchTab*> *all_tab; // To store all tabs
   public:
     SearchEngine(bittorrent *BTSession, QSystemTrayIcon *myTrayIcon, bool systrayIntegration);
     ~SearchEngine();