In order to ensure unique registration of ToolbarItems,
a unique timestamp is used for each item to register with.

Change-Id: I4ba901c2c7fc80dd531c29e4c444ecc16b6b6826
Resolves: #67789
Releases: master
Reviewed-on: http://review.typo3.org/40700


Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>