[TYPO3-core] RFC #13996: code cleanup: hardcoded image shown in "HELP > About TYPO3" (backend-redesign)

[Stephan N Kellermayr]

this is an SVN patch request.

type: code cleanup

bugtracker references:
http://bugs.typo3.org/view.php?id=13996

branches:
trunk, current branch

problem:
the logo shown in "Help > About TYPO3" is hardcoded, which is not good 
for backend-redesign.

this image is 'gfx/typo3logo.gif', which in any other case can be 
overridden with $GLOBALS['TBE_STYLES']['logo_login'], but not at the 
page "About TYPO3".

if you install the latest version of 't3xskin' (v.1.0.0, wait a few 
hours, i have just uploaded the new version and deactivate XCLASSing at 
install), and set the skin to 'dark' you will see that the hardcoded 
gif-image looks very ugly because of the light image-background.

solution:
just check $GLOBALS['TBE_STYLES']['logo_login'] in 
'typo3/sysext/about/mod/index.php', and if it is set, resolve backpath, 
getimagesize and return this alternative image.

notes:
none


best regards,
Stephan N Kellermayr
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