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

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
* 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 padding.
These were aligned centrally, elements remade to match equal proportions and alignment amongst other visible improvements like half pixels.
Outer ring is now #b4b4b4 and a shade lighter gradient which is the confluence blue colors from defaults.xml
Some of these were extremely hard to copy from raster/vector so opted to some alterations (sorry)

All files had issues with pixelation, alignment and sizing and elements mixmatch.
consistency of some elements, some of which the infamous half pixels.

A Textures.xbt for testing if anyone wants,
https://github.com/uNiversaI/Test/raw/master/Textures.xbt

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.