gtk3-demo: Don't leak the color chooser
gtk3-demo: Don't leak the color chooser

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