[TASK] EM: Replace alert with callout

Replace the "Please read this carefully" alert with the more proper callout.

Resolves: #66137
Releases: master
Change-Id: I90de760022af701d2d06479d7b64fae59e08a281
Reviewed-on: http://review.typo3.org/38342


Reviewed-by: Xavier Perseguers <xavier@typo3.org>
Tested-by: Xavier Perseguers <xavier@typo3.org>
Reviewed-by: Nicole Cordes <typo3@cordes.co>
Tested-by: Nicole Cordes <typo3@cordes.co>