[TASK] Readd search string in module "Configuration"

The input field of the configuration module's search 
is never populated with the search term.

Solution: move one line some lines up to get the value.

Releases: 6.2
Resolves: #57486
Change-Id: I7ff86e3336cb473df259c3aeb7d0c918fbc48bab
Reviewed-on: https://review.typo3.org/29015
Reviewed-by: Georg Ringer
Tested-by: Georg Ringer