Make double clicking on table in CatalogInspector open crud for selected table/view.

pglab/widgets/CatalogTablesPage.h

@@ -6,6 +6,7 @@
 #include <memory>
 #include <optional>
 #include <QAbstractItemModel>
+#include "Pgsql_oids.h"
 
 class CatalogConstraintPage;
 class CatalogIndexPage;
@@ -32,6 +33,9 @@ public:
 	void setNamespaceFilter(NamespaceFilter filter);
 
 	void retranslateUi(bool all = true);
+
+signals:
+	void tableSelected(Oid tableoid);
 private:
 	PgLabTableView *m_tableView = nullptr;
 	TablesTableModel* m_tablesModel = nullptr;