Returns the name of a shortcut set, based on a provided number.
All shortcut sets have names like "shortcut-set-N" so that they can be matched with a properly-namespaced entry in the {menu_links} table.
$number: A number representing the shortcut set whose name should be retrieved.
A string representing the expected shortcut name.
function shortcut_set_name($number) {
return "shortcut-set-{$number}";
}