[TASK] Use high-resolution module icon

Change-Id: I64b7d87b5f296dc8fde190e0dcbf61e3eff02e25
Reviewed-on: http://review.typo3.org/32669
Reviewed-by: Xavier Perseguers <xavier@typo3.org>
Tested-by: Xavier Perseguers <xavier@typo3.org>