use Export and Import for the buttons in GTK+ 2.x as well;
get rid of a duplicate fclose;
other fixes.
Update the description of color filters in the Ethereal man page to
reflect the change, clean up the formatting (use =item), and add the
global and personal color filters files to the FILES section; refer to
them as "color filters" files rather than "colorfilters" files, as the
FILES section gives the "colorfilters" file name so you don't have to
use that as the name.
Clean up white space.
svn path=/trunk/; revision=8285
add support for a system-wide color filter file;
fix a bug where "read_filters()" didn't close the file handle.
Use the "get_datafile_path()" routine he added to construct the pathname
of the Diameter directory, the global preferences file, and the manuf
file.
svn path=/trunk/; revision=7677
