GTK 4.0

Version 4.0 of the GTK toolkit has been released. "It isimpossible to summarize 4 years of development in a single post. We'vewritten detailed articles about many of the new things in this release overthe past year: Datatransfers, Eventcontrollers, Layoutmanagers, Rendernodes, Mediaplayback, Scalablelists, Shaders, Accessibility." GTK 2 has reached the end of its life.