retina Boolean(default: true)

If set to true, the application will set the meta viewport tag scale value according to the device pixel ratio, and re-scale the app by setting root element font size to the respective value. This will result in the widget borders/separators being real 1px wide. For example, in iPhone 4/5, the device pixel ratio is 2, which means that the scale will be set to 0.5, while the app root will receive a font-size: 2 * 0.92 inline style set.