[BUGFIX] Correct JS quoting in indexed_search page browser

This is a regression fix for #66759.

Releases: master
Resolves: #68956
Change-Id: Id3bda7cbe919952bc42c0f4d3d68c40eb1e73165
Reviewed-on: http://review.typo3.org/42529


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