* Fix audio thumbs normalization (https://phabricator.kde.org/D26355)
* Use uint_8 to store audio thumbs (spare memory) * Fix disappearing audio thumbs on some zoom levels * Improve target colors (related to !71)
* Use uint_8 to store audio thumbs (spare memory) * Fix disappearing audio thumbs on some zoom levels * Improve target colors (related to !71)