New functionality. jump_quickly() can now handle an initial array parameter that has keys 'path' and 'query' such that 'path' contains the options and 'query' contains the query portion of the path. This enables jump menus to jump to paths with query strings.
New features include a more friendly user interface for activating top-level menu based jump menu blocks and vocabulary based menu blocks. These work similar to the way Jump menu did things in 5.x.