project: fix issues with filename encoding in folder extras
pvr: channel/guide osd improvements

* new skin setting to choose the alignment of channel osd (left/right)
* revert to old channel osd with channel icons
* redesign of guide osd
* changed color of SelectedGreen to white
pvr: added new extended channel osd

Adds a new extended channel osd and a skin setting to enable/disable
the extended channel osd.