Textures updates to match skin colors/style

Progress-bar/Scrollbar texture updates
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
* Floor.png Which covers main menu and other views (is same texture as
when
pulling osd it improves visibility of background and improves matching
style.

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

Further texture color tweaks

Tweaked all OSDfooFO.png to match closer the blue color of confluence.
All these really had far too different shades

Tweaked the Scrollbar V/H Focus to match closer

Tweaked the OSDProgress outline to be yet slightly fainter still.

All these textures were probably done at different times and different
people as such palettes really were not same, and without source files
its hard to do a perfect job.

Revert floor.png scrollbar bg/progress outline

No scrollbar blue bg even though even though original unmodified was
blue too  color was #b7e6fb and now its # 1a1d1f which is dark grey.

Floorpng is original untouched.

Tweaked the progress bar outline color to much faded shade now.

Updated Test Textures.xbt to match this commit and all other changes.

idk how to squash commits and push to PR.

Final tweak to OSDProgressBack/MID

Outline is now moot #b4b4b4 which is one of the confluence colors from
defaults.xml