items.push_back (MenuElem (_("Mute"), bind (mem_fun (*this, &Editor::set_region_mute), true)));
items.push_back (MenuElem (_("Unmute"), bind (mem_fun (*this, &Editor::set_region_mute), false)));
items.push_back (MenuElem (_("Opaque"), bind (mem_fun (*this, &Editor::set_region_opaque), true)));
items.push_back (MenuElem (_("Transparent"), bind (mem_fun (*this, &Editor::set_region_opaque), false)));
/* We allow "Original position" if at least one region is not at its
items.push_back (MenuElem (_("Mute"), bind (mem_fun (*this, &Editor::set_region_mute), true)));
items.push_back (MenuElem (_("Unmute"), bind (mem_fun (*this, &Editor::set_region_mute), false)));
items.push_back (MenuElem (_("Opaque"), bind (mem_fun (*this, &Editor::set_region_opaque), true)));
items.push_back (MenuElem (_("Transparent"), bind (mem_fun (*this, &Editor::set_region_opaque), false)));
/* We allow "Original position" if at least one region is not at its