added an "add" button to post messages directly from the updatebox

mitterlib/ui/helpers/gtk_updatebox.py

@@ -65,11 +65,15 @@ class UpdateBox(gtk.VBox):
         close_button.set_relief(gtk.RELIEF_NONE)
         close_button.connect('clicked', self.hide)
 
+        add_button = gtk.Button(stock=gtk.STOCK_OK)
+        add_button.set_relief(gtk.RELIEF_NONE);
+
         status_bar = gtk.HBox(False, 0)
         status_bar.pack_start(self._update_status, expand=True, fill=False,
                 padding=0)
         status_bar.pack_start(self._update_info, expand=True, fill=False,
                 padding=0)
+        status_bar.pack_start(add_button, expand=false, fill=False, padding=0)
         status_bar.pack_start(close_button, expand=False, fill=False,
                 padding=0)