GList* from gtk_container_get_children must be freed
memory leak - fix upstream from https://github.com/Gnucash/gnucash/commit/4cf25cb7be27480dbfc92a0b6ebe83d288e23caf
memory leak - fix upstream from https://github.com/Gnucash/gnucash/commit/4cf25cb7be27480dbfc92a0b6ebe83d288e23caf