fix hints about moving by hour
fix hints about moving by hour

o/O do not move forward/backward an hour; in fact, no hotkey does,
but 6/^ are about as close as it gets.

tstack/lnav,sureshsundriyal/lnav,tstack/lnav,tstack/lnav,tstack/lnav,sureshsundriyal/lnav,sureshsundriyal/lnav,sureshsundriyal/lnav