[TYPO3-core] FYI48: #8875: typo3 logo in backend on top left looks not perfect because it has white background on gradient background

[Johannes Feustel]

Steffen Kamper schrieb:
> When skinning and use other background on topbar in BE the logo needs to 
> be transparent.
> Attached image is transprent, thx to Cyrill Helg for providing the image

Hi,
there are still some almost white pixels in the picture. I made a 
version with an alpha-transparency on the "anti aliasing pixels".
Now it looks smoother on dark colored backgrounds.

(Also squeezed out 20 Bytes ;-) )

Johannes