if no launch time is provided for an application, make one up.

if no launch time is provided for an application, make one up.

if the window is related to other existing windows
  and one of those windows was the last used
    then we will give it a launch time equal to the last user time,
    which will end up giving the window focus probably.
  else
    the window is related to other windows, but you are not working in them?
    seems suspicious, so we will give it a launch time of NOW - STEAL_INTERVAL,
    so it will be given focus only if we didn't use something else during the
    steal interval.
else
  the window is all on its own, so we can't judge it.  give it a launch time
  equal to the last user time, so it will probably take focus.

this way running things from a terminal will give them focus, but popups
without a launch time shouldn't steal focus so easily.