* Added read book art
* Added basic tween/fade functions to WidgetBase
Merge branch 'master' of https://github.com/schlangster/skyui into HUDWidgets
* Restoring of sort indices
Revert "* Restoring of sort indices"

This reverts commit 730fa4cbb7f2fbee0ea54b4085224fa364247b37.

Improved?
* Refactored list state restoring