[FEATURE] Add filter for available records in multi select element

This patch adds the possibility to filter available items in a multi
select element. By TCA settings you could enable a text field for
individual word filter and you could predefine search words the user
can select in a drop down.

Resolves: #49739
Releases: 6.2
Change-Id: I7112d10009da01a68c8e883719e2f4cee5201002
Reviewed-on: https://review.typo3.org/24671
Reviewed-by: Alexander Opitz
Tested-by: Alexander Opitz
Reviewed-by: Anja Leichsenring
Tested-by: Anja Leichsenring