display tree, based on Jeff Foster's dialog box for selecting fields.
Make the dialog box for browsing filters into a dialog box for
constructing filters; make the "Apply" button and the "OK" button apply
the filter in the text entry box in the dialog, not the currently
selected filter (selecting a filter puts it in that text entry box, but
the user may edit it afterwards, or may use the aforementioned dialog
box to construct a filter not in the list).
Get rid of extra declarations of "m_r_font" and "m_b_font" in
"proto_draw.c"; they're declared in "gtk/gtkglobals.h", which it includes.
svn path=/trunk/; revision=2805
Guy Harris