widget-factory: Add an icon view
widget-factory: Add an icon view

We didn't have one before, and this gives us a chance to show off
rubberbanding and symbolic icon rendering.

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