Time traveling applications

[John Tapsell]

Hi all,

  It seems that quite a few applications have the potential to show
past information, and I'm thinking that it would be good to get a
consistent GUI for this sorted out earlier rather than later.

  Consider a file manager showing the contents of a folder at an
earlier date.  Or Okular etc showing previous versions of a file using
the same technology.  (Whether that is an SCM or filesystem
snapshots).

  In my particular case, System Activity (ctrl+esc thing) could get
process and system data for any previous time and date if "atop" is
installed.  (atop logs that info every 10 mins).  But I wouldn't know
how to expose this GUI wise.

John