is the same as "Tools/Capture", and "Display" has an "Options" item,
which pops up a dialog box to let you change the "default" time-stamp
column display format on the fly (the "default" is what the "-t"
command-line option sets), and have the display change when you do that.
Made infrastructure changes to make the immediate display update work.
Removed some unused functions, declared some functions used only in the
file in which they're defined "static", and removed some unnecessary
#includes.
svn path=/trunk/; revision=317
Guy Harris