inspector: Add GtkTreeSelection to the object tree
inspector: Add GtkTreeSelection to the object tree

It is not accessible, otherwise.

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