On opening a file, save it's modification timestamp (update it on saving).
Just before saving, double check that the timestamp is the same so we don't
overwrite something we don't want to.
On ACTIVATE (OS-level focusIn) we should do this for all opened files & prompt
the user if any changed.
Original issue reported on code.google.com by petterson.erik@gmail.com on 4 Nov 2010 at 5:56
Original issue reported on code.google.com by
petterson.erik@gmail.com
on 4 Nov 2010 at 5:56