Commit Briefs
switch tog ref view's sort order command key to "o" instead of "s"
The letter "o" does not overlap with existing options of 'got ref' and is also used by mutt(1) for this purpose.
remove the 'ctrl+u' shortcut in favour of just 'g' as alias for 'Home'
Our use of ctrl+u was not consistent with vi(1) after all. Discussed with naddy, tb, and jasper on gameoftrees@
tog: add support for navigating to first/last item of log and diff views
The keybindings that we settled on are Home, Ctrl-u and g to go to the first item and End, G to go to the last. This resembles those commonly found elsewhere, eg vi/less. discussed with and ok stsp