recent chooser: Make it expand
recent chooser: Make it expand

It is expected that the list fills the available space.

https://bugzilla.gnome.org/show_bug.cgi?id=750690

jigpu/gtk,alexlarsson/gtk,chergert/gtk,grubersjoe/adwaita,chergert/gtk,chergert/gtk,davidgumberg/gtk,jadahl/gtk,davidgumberg/gtk,jadahl/gtk,jadahl/gtk,Adamovskiy/gtk,alexlarsson/gtk,chergert/gtk,grubersjoe/adwaita,grubersjoe/adwaita,Adamovskiy/gtk,jigpu/gtk,jigpu/gtk,alexlarsson/gtk,chergert/gtk,jadahl/gtk,alexlarsson/gtk,Adamovskiy/gtk,jadahl/gtk,alexlarsson/gtk,davidgumberg/gtk,grubersjoe/adwaita,alexlarsson/gtk,chergert/gtk,Adamovskiy/gtk,Adamovskiy/gtk,jigpu/gtk,jigpu/gtk,davidgumberg/gtk,alexlarsson/gtk,chergert/gtk,davidgumberg/gtk,jadahl/gtk,jigpu/gtk,grubersjoe/adwaita,Adamovskiy/gtk,jadahl/gtk,davidgumberg/gtk,grubersjoe/adwaita,chergert/gtk,jigpu/gtk,alexlarsson/gtk,davidgumberg/gtk,grubersjoe/adwaita,Adamovskiy/gtk,Adamovskiy/gtk,grubersjoe/adwaita,jigpu/gtk,davidgumberg/gtk,jadahl/gtk