[TASK] Move backend logo rendering to fluid

The backend logo in the left corner was rendered via it's own
simple class which can easily be replaced by Fluid and the logic
for that.

The old LogoView class is now marked for deprecation.

Resolves: #66065
Releases: master
Change-Id: Ief36fece1fcde3633cf67367153db4f75985e166
Reviewed-on: http://review.typo3.org/38263


Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Andreas Fernandez <andreas.fernandez@aspedia.de>
Tested-by: Andreas Fernandez <andreas.fernandez@aspedia.de>