New smaller (file size) and matching color/styles to skin.

Files updated/improved?

* OSDProgress/Back/Mid/Light.png which covers all UI volume/progress bars
* ScrollbarH/H_bar/H_bar_focus.png which covers all Horizontal
scrollbars
* ScrollbarV/V_bar/V_bar_focus.png which covers all Vertical scrollbars
* Tweaked all OSDfooFO.png to match closer the blue color of confluence.
	All these really had far too different shades of blue in the outer ring, different sizes (when they should match i.e. outer ring) and placed in same place in canvas with 3 pixels all around.
	These were aligned centrally, elements remade to match equal proportions and alignment amongst other visible improvements.
	This is not a design change, aside from color adjustments.
	Outer ring is now moot #b4b4b4 and a shade lighter gradient which is the confluence blue colors from defaults.xml
Various precicion tweaks
* icon_pictures, icon_player, icon_power, icon_favorites, icon_mute, VolumeIcon, icon_back etc. These had obvious half pixels issues.
	Some of these wrere extremely hard to copy from raster/vector so opted to some alterations (sorry)

A Textures.xbt for testing if anyone wants,
https://github.com/uNiversaI/Test/raw/master/Textures.xbt

All these files had issues with pixelation, aligment and size
consistency of some elements, some of which the infamous half pixels.

I will be commiting full PSD sources on a separate branch, these sources
have vectors instead of rasters which allow much more flexibility. Dues
to size and complexity of psd it will take me a couple of days to sort
through and organize the file(s)

The psds will be for everything done so far.

It also fixes and completes the tweaks to progress bar/scroll bar.

There's still a few left (favorites, power button) but only a couple
since the vast majority of textures are just fine.

Use or dont use, the improvements are 100% visible.

Please provide feedback so it can be further improved.