ft: Closing windows asks to save queries before closing the window.

fix: closetab did incorrectly close when cancel was choosen.

pglab/DatabaseWindow.h

@@ -50,6 +50,10 @@ public:
 
 	QueryTool *GetActiveQueryTool();
 	CrudTab *GetActiveCrud();
+
+protected:
+	virtual void closeEvent(QCloseEvent *event) override;
+
 private:
 	QTabWidget *m_tabWidget = nullptr;
 	QToolBar *m_mainToolBar = nullptr;