bootctl: minor reordering of fields in output

bootctl: minor reordering of fields in output

Let's move the currently used/default/oneshot entry output after the
basic info about the boot loader itself, since conceptually these are
objects kinda "one level down" from the boot loader perspective. Hence,
let's *first* show all info about the boot loader itself before we
display the objects it manages.

This is just a trivial change in output, just swaps th elines for these
fields with the ones showing where the boot loader is installed.