[TASK] Replace icon in workspace toolbar

Additionally a typo is fixed by removing the whole line
as the icon is being searched in line 119 anyway

Change-Id: Iac230581dc86c7d05b3582b1aaca5da2b0efec30
Resolves: #63293
Releases: master
Reviewed-on: http://review.typo3.org/34543
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Benjamin Mack <benni@typo3.org>
Tested-by: Benjamin Mack <benni@typo3.org>