GTK+ 3.19.6 Brings a HighContrastInverse Theme, More CSS and Wayland Improvements

GTK+ 3.19.6 is both a feature and bugfix release. It adds many new CSS changes, such as better support for CSS border, padding and margins, min-height and min-width support for more widgets, consistent updates to the CSS documentation, expansion of CSS properties, and CSS syntax support for Radial gradients.