applied OS X fixes.
implement fix_font_setting() for Mac OS X.
src/gtkutils.c: removed unused variable.
always display fixed-positioned windows on screen.
include gtk/gtk.h as a workaround for GTK+ >= 2.13.3.
spaces in address and server entries are automatically removed at applying account configuration.
win32: check for the loadability of the default font.
win32: made a workaround for the redraw problem in GTK+ 2.10.11.
reimplemented the toolbar with new APIs.
win32: fixes window not brought in front with the tray icon click after DnD.
enable fast clear of summary view if GTK+ >= 2.10.0.
fixes main window kept hidden on popup with another process.
made workarounds for the crash in GTK+ 2.8.x.
don't enable trayicon action if modal window exists. Present window on click if main window is obscured.
when deleting a collapsed thread, all the messages in the thread will be removed.
summaryview.c: align selected row to center when reached to the edge on key operation.
removed mbs/wcs functions which are no longer required.
fixed warnings about signedness difference.
added UI hints for IMAP4 operation.
added margin for visibility when scrolling summary.
made the order of buttons comply with GNOME HIG.
fixed scroll positon problem after some operations.
fixed compilation failure with GTK 2.4.
fixed selection problem after execution.
made rules hint configurable. Removed debug code.
fixed compilation failure on GTK+ 2.4.
reimplemented summary view with GtkTreeView.
improved performance of the update of statusbar.
folderview.c: remember the column width and restored Search menu.
implemented message-to-folder DnD.
reimplemented folder view with GtkTreeView.
optimized making of clickable URI.
gtkutils.[ch]: removed non-used code.
gtkutils.c: modified the find text API.
use gtk_window_present() to popup window.
replaced intl.h with glib/gi18n.h.
reimplemented message text search.
made the font size of supplementary explanations of config dialogs smaller.
improved font management.
use GTK stock button for dialog button set.
reduce the size of combo button arrow.
Initial import of Sylpheed (GTK2 version).