Fix some typo bugs in Database query

Add Group/UnGroup/UpdateNextMonths buttons
Display correct title in AccountPannel

src/model/Database.hpp

@@ -43,7 +43,7 @@
 #define EXECUTE_SQL_UPDATE_WITH_CODE(req, return_value, code_if_fail, code_if_syntax_fail) \
     do {								\
 	QSqlQuery query;						\
-	if (!query.exec(req))					\
+	if (!query.exec(req))						\
 	{								\
 	    QMessageBox::critical(0, _("Error"), _("Update failed !\n") + req); \
 	    std::cerr << __FUNCTION__ << "\n" ;				\