Instead of putting two navigation keys on their own lines in the help
dialog, cluster them by sibling relationship (up/down, next/prev) and
show the pair on one line:
n / p : Next page / previous page
] / [ : Next file / previous file
To improve clustering of identical actions and make it easier to
locate a task each group is now sorted by help text, rather than
by key stroke.
Change-Id: I21d0d93558d276a78127b110c6afc77852ab8ba9
bb18abb8f5