popover: propagate (insensitive|backdrop) flags from relative-to widget
popover: propagate (insensitive|backdrop) flags from relative-to widget

Popovers aren't direct children of the widget they point to, but yet
they act as children of it, so do the same with state propagation,
so the flags that propagate across the hierarchy reach popovers too.

chergert/gtk,Adamovskiy/gtk,Adamovskiy/gtk,davidgumberg/gtk,msteinert/gtk,chergert/gtk,alexlarsson/gtk,Lyude/gtk-,ahodesuka/gtk,ahodesuka/gtk,jessevdk/gtk,grubersjoe/adwaita,Sidnioulz/SandboxGtk,jessevdk/gtk,Lyude/gtk-,chergert/gtk,Lyude/gtk-,alexlarsson/gtk,jessevdk/gtk,grubersjoe/adwaita,Lyude/gtk-,Adamovskiy/gtk,jessevdk/gtk,jessevdk/gtk,Adamovskiy/gtk,Lyude/gtk-,Lyude/gtk-,davidgumberg/gtk,Lyude/gtk-,msteinert/gtk,Adamovskiy/gtk,jadahl/gtk,jessevdk/gtk,jadahl/gtk,grubersjoe/adwaita,davidgumberg/gtk,alexlarsson/gtk,Sidnioulz/SandboxGtk,alexlarsson/gtk,jessevdk/gtk,davidgumberg/gtk,ahodesuka/gtk,grubersjoe/adwaita,ahodesuka/gtk,jadahl/gtk,chergert/gtk,alexlarsson/gtk,chergert/gtk,alexlarsson/gtk,grubersjoe/adwaita,jadahl/gtk,jigpu/gtk,msteinert/gtk,davidgumberg/gtk,alexlarsson/gtk,chergert/gtk,Adamovskiy/gtk,davidgumberg/gtk,jigpu/gtk,Adamovskiy/gtk,grubersjoe/adwaita,Sidnioulz/SandboxGtk,grubersjoe/adwaita,alexlarsson/gtk,jadahl/gtk,Sidnioulz/SandboxGtk,ahodesuka/gtk,Sidnioulz/SandboxGtk,davidgumberg/gtk,jigpu/gtk,ahodesuka/gtk,jadahl/gtk,ahodesuka/gtk,msteinert/gtk,chergert/gtk,grubersjoe/adwaita,chergert/gtk,msteinert/gtk,Lyude/gtk-,Adamovskiy/gtk,jigpu/gtk,jigpu/gtk,Sidnioulz/SandboxGtk,msteinert/gtk,jadahl/gtk,jigpu/gtk,ahodesuka/gtk,davidgumberg/gtk,jigpu/gtk,jigpu/gtk,jadahl/gtk