Texture fixes (precision, aligment & match skin colors/style)

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
* Fixed/redone all OSDfooFO.png precision/aligment and elelments size match closer the blue color of confluence.
Various precision 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)

All OSDfooFO/NF 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 like half pixels.
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

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.

Full PSD sources (These sources have vectors instead of rasters which allow much more flexibility and future proofing)
See https://github.com/uNiversaI/skin.confluence/tree/master/PSD_Sources

Please provide feedback so it can be further improved.

All squashed into one and pushed.