As styling was already there, but just for mouse, and same is true for
selecting results. The keyboard events now trigger the same behaviour.

Change-Id: Ie265f3b5785efc89f7148b8303d9b62c3a5add88
Resolves: #70463
Releases: master, 7.6
Reviewed-on: https://review.typo3.org/47932


Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Morton Jonuschat <m.jonuschat@mojocode.de>
Tested-by: Morton Jonuschat <m.jonuschat@mojocode.de>