Ensure Enter key works as continue button click on Setup Wizard

[AlexVelezLl]

Summary

This PR makes the use of the enter key consistent in all forms steps of the setup wizard and is the same as the behavior that would occur if the user clicks on the "Continue" button, including the form validations. This works with the steps with text inputs for now, but with the steps with radio button inputs, the issue KDS#489 must be resolved first, which prevents KRadioButtons from getting focus when rendered dynamically.

Before

Compartir.pantalla.-.2023-11-17.11_54_12.mp4

After

Compartir.pantalla.-.2023-11-20.08_39_19.mp4

References

#11458

Reviewer guidance

Go to the setup wizard and check that in forms with text inputs, the enter key works as if you clicked the enter button, including the form validations.

Testing checklist

• Contributor has fully tested the PR manually
• If there are any front-end changes, before/after screenshots are included
• Critical user journeys are covered by Gherkin stories
• Critical and brittle code paths are covered by unit tests

PR process

• PR has the correct target branch and milestone
• PR has 'needs review' or 'work-in-progress' label
• If PR is ready for review, a reviewer has been added. (Don't use 'Assignees')
• If this is an important user-facing change, PR or related issue has a 'changelog' label
• If this includes an internal dependency change, a link to the diff is provided

Reviewer checklist

• Automated test coverage is satisfactory
• PR is fully functional
• PR has been tested for accessibility regressions
• External dependency files were updated if necessary (yarn and pip)
• Documentation is updated
• Contributor is in AUTHORS.md

[github-actions]

Build Artifacts

Asset type	Download link
PEX file	kolibri-0.16.0b6.dev0_git.528.gc4e2281c.pex
Windows Installer (EXE)	kolibri-0.16.0b6.dev0+git.528.gc4e2281c-unsigned.exe
Debian Package	kolibri_0.16.0b6.dev0+git.528.gc4e2281c-0ubuntu1_all.deb
Mac Installer (DMG)	kolibri-0.16.0b6.dev0+git.528.gc4e2281c-0.3.0.dmg
Android Package (APK)	kolibri-0.16.0b6.dev0+git.528.gc4e2281c-0.1.0-debug.apk
TAR file	kolibri-0.16.0b6.dev0+git.528.gc4e2281c.tar.gz
WHL file	kolibri-0.16.0b6.dev0+git.528.gc4e2281c-py2.py3-none-any.whl

[nucleogenesis]

I'll leave final approval to whoever does manual QA but on the code-front everything here looks great 👍🏻

[akolson]

Updates look correct to me. Will defer to @radinamatic @pcenov for manual QA sign-off. Thanks @AlexVelezLl!. @AlexVelezLl could you also add yourself as a contributor if you haven't already done so. Thanks

[pcenov]

Implemented as specified, thank you @AlexVelezLl!