[TASK] Revert icon change in tree for mount pages

Change-Id: Ie42e9c43d97c809a7827b1a7bf464052f462fa75
Resolves: #63314
Releases: master
Reviewed-on: http://review.typo3.org/34594
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Frank Nägler <typo3@naegler.net>
Tested-by: Frank Nägler <typo3@naegler.net>