gtk_box_set_child_packing(GTK_BOX(m_mainWidget),
statbar->m_widget, false, false, 0, GTK_PACK_END);
// make sure next size_allocate on statusbar causes a size event
gtk_box_set_child_packing(GTK_BOX(m_mainWidget),
statbar->m_widget, false, false, 0, GTK_PACK_END);
// make sure next size_allocate on statusbar causes a size event