[BUGFIX] Enable login refresh form submit via ENTER key

By making the modal's primary button a submit button
and binding it to the form, the user can now use the ENTER key to
submit the password.

Resolves: #97746
Releases: main, 11.5
Change-Id: Icc380057259a0c44511098d640bdd8c4ca395a55
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/74867


Tested-by: core-ci <typo3@b13.com>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>