[BUGFIX] Remove wrong quoting

While moving the element browser to a module
quoting was added in several places.

However quoting DocumentTemplate::issueCommand
calls does not work, as the returned string
contains JavaScript.

Remove the quoting in these places.

Resolves: #56622
Releases: 6.2
Change-Id: I1b9ec8b4a5900940a5c5dfd81ed712f2994ecef3
Reviewed-on: https://review.typo3.org/28119
Reviewed-by: Markus Klein
Tested-by: Markus Klein
Reviewed-by: Alexander Schnitzler
Tested-by: Alexander Schnitzler
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters