GtkPopover as replacement of GtkMenu in small apps.

[Константин Пугин <ria freelander gmail com>]

I try to use GtkPopover and GtkScaleButton on panel, and dropdowns from this must not be on the panel, but must be on another translucent windows (like GtkMenu was). Why I cannot use GtkPopover and GtkScaleButton this way without writing GtkWindow helper (GtkPopover try to show its popover on panel, but down from this)? Will it be possible on Gtk 3.16?