[TASK] Make text translatable in ShortcutMenu JavaScript

Resolve the todo's for translations and notification.

Resolves: #73505
Releases: master, 7.6
Change-Id: I43cb48fcd7efeb388ed5c54c9df7464ee4e0472d
Reviewed-on: https://review.typo3.org/46728


Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Markus Klein <markus.klein@typo3.org>
Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Tested-by: Andreas Fernandez <typo3@scripting-base.de>