Kodi settings controller to dynamically adapt its layout

[wutschel]

The controller SettingsValuesViewController implements the Kodi settings menu. The controller reads the available settings from Kodi and displays labels, texts and UI elements like radio buttons or sliders. The controller hardcodes the layout using various magic numbers. In b085388 there was already an -- also hardcoded -- fix added to show the complete text of a very long settings description. In consequence there is now far too much space given for other settings.

A rework of this controller is desired to let the UI element's positions and label dimensions follow the setting's text and needs dynamically. This will also make it future proof for any changes in Kodi setting's descriptions.