[TASK] Change input type of search-fields from text to search

This changes the html input type for the search-fields from
"text" to the semantically correct "search".

Releases: master
Resolves: #61777
Change-Id: Id8a5fc9155a89898e5aede0a2e2e82f99b967529
Reviewed-on: http://review.typo3.org/32903
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Reviewed-by: Ingo Pfennigstorf <i.pfennigstorf@gmail.com>
Tested-by: Ingo Pfennigstorf <i.pfennigstorf@gmail.com>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>