fixed a bug that filter settings are removed if Escape key is pressed quickly on auto filter rule creation.
added new plug-in signals for preferences dialogs (#30)
fixed duplicated keyboard accelerators in account edit dialog and filter dialog.
use target header field as a default filter name when creating filter rule automatically.
fixed saved search.
made more prefs_filter functions public.
win32: fixed window focus problem on account dialog and filter dialog.
fixed focus problem in win32.
prefs_filter_open(): correct focus when msginfo is specified.
moved two functions from prefs_filter.c to filter.c.
moved prefs_filter_read_config() to filter.c.
separated UI code from prefs.c.
added wrappers for C library function that take pathname arguments.
fixed Turkish locale problem.
made some buttons stock button.
made column of TreeView resize automatically.
reimplemented filter prefs dialog using GtkTreeView.
prefs_filter.c: use stock buttons.
replaced intl.h with glib/gi18n.h.
use GTK stock button for alertpanel.
use GTK stock button for dialog button set.
implemented the migration of configuration.
automatically take over older config files.
removed resize grip of the statusbar of main window.
Initial import of Sylpheed (GTK2 version).