[FEATURE] Add "LLL:" support in PAGE.inlineLanguageLabel

You can add either a constant or a locallang reference using
page.inlineLanguageLabel.[key]

Resolves: #57237
Releases: master
Change-Id: I519e0c70908752ec69cb015ed7785995fb2bf5e8
Reviewed-on: http://review.typo3.org/29605


Reviewed-by: Nicole Cordes <typo3@cordes.co>
Tested-by: Nicole Cordes <typo3@cordes.co>
Reviewed-by: Göran Bodenschatz <coding@46halbe.de>
Reviewed-by: Frank Nägler <typo3@naegler.net>
Tested-by: Frank Nägler <typo3@naegler.net>