[FEATURE] Add autofocus to pass input in install

Restore the focus to the password input just after
opening the install tool.

Resolves: #52523
Releases: 6.2
Change-Id: I12ce920791b45b4c8ea2e28838c81e2e3b5af8cd
Reviewed-on: https://review.typo3.org/24489
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn
Reviewed-by: Helmut Hummel
Tested-by: Helmut Hummel