[TASK] Database analyzer: Enable add tables and add fields

Enable the check boxes for 'add tables' and 'add fields' in the
database analyzer by default. Adding is not risky and can be
suggested automatically.

Resolves: #49705
Related: #49162
Releases: 6.2

Change-Id: Ib3069a135f4baedc2bebf59ed5c42a72937fb897
Reviewed-on: https://review.typo3.org/21943
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters
Reviewed-by: Anja Leichsenring
Tested-by: Anja Leichsenring