If the user changes a field in a custom preset in the Install Tool
the custom preset's radio box must be selected too.

Resolves: #76365
Releases: master, 7.6
Change-Id: Iee499d61574e88ef094d690bea7ff827aa7507dc
Reviewed-on: https://review.typo3.org/48394


Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Frank Naegler <frank.naegler@typo3.org>
Tested-by: Frank Naegler <frank.naegler@typo3.org>