drp_groups->set_tooltip("Select zone group to edit");
drp_groups->signal_item_selected.connect(sigc::mem_fun(this, &Zonebar::group_selected));
pnl_content->add(*(drp_numbers = new GLtk::Dropdown));
drp_groups->set_tooltip("Select zone group to edit");
drp_groups->signal_item_selected.connect(sigc::mem_fun(this, &Zonebar::group_selected));
pnl_content->add(*(drp_numbers = new GLtk::Dropdown));