Force a show event in the pop-up menu so that on first click the menu is

shown properly.

deluge/ui/gtkui/filtertreeview.py

@@ -323,7 +323,10 @@ class FilterTreeView(component.Component):
 
             #Show the pop-up menu
             self.set_menu_sensitivity()
+            self.menu.hide()
             self.menu.popup(None, None, None, event.button, event.time)
+            self.menu.show()
+
             if cat == "cat":
                 # Do not select the row
                 return True