Converted filter_edges.png to 8-bit so it would play nicely with texture packer.
Checklist:
[x ] My code follows the [add-on rules](http://kodi.wiki/view/Add-on_rules) and [piracy stance](http://kodi.wiki/view/Official:Forum_rules#Piracy_Policy) of this project.
[x ] I have read the [CONTRIBUTING](https://github.com/xbmc/repo-skins/blob/master/CONTRIBUTING.md) document
[x ] Each add-on submission should be a single commit with using the following style: [plugin.video.foo] v1.0.0