[BUGFIX] Error 404 for RunnerRunning.gif on hover

Resolves: #55003

Change-Id: Ie2ecf02fcd70205fff3aabcf7e497b746ae4b1ad
Reviewed-on: http://review.typo3.org/34887
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Tested-by: Oliver Klee <typo3-coding@oliverklee.de>