feat(new reviewer): box frame style

[BrayanDSO]

Purpose / Description

Anki's Webview frame is a rectangle stretched to the window borders, while the new reviewer has a nice Card like frame, which is more aesthetical.

Given that many card templates were created based on Anki's default frame, the Card style may not suit them well (e.g. by using a card template on the card frame, so the style ends up duplicated).

So, this PR gives an option to switch to the old frame, used by Anki and the old reviewer.

How Has This Been Tested?

Screenshots

Checklist

Please, go through these checks before submitting the PR.

• You have a descriptive commit message with a short title (first line, max 50 chars).
• You have commented your code, particularly in hard-to-understand areas
• You have performed a self-review of your own code
• UI changes: include screenshots of all affected screens (in particular showing any new or changed strings)
• UI Changes: You have tested your change using the Google Accessibility Scanner

[github-actions]

Important

Maintainers: This PR contains Strings changes

1. Sync Translations before merging this PR and wait for the action to complete
2. Review and merge the auto-generated PR in order to sync all user-submitted translations
3. Sync Translations again and merge the PR so the huge automated string changes caused by merging this PR are by themselves and easy to review

[david-allison]

Looks great, nothing blocking

[lukstbit]

LGTM, thanks!

[github-actions]

Maintainers: Please Sync Translations to produce a commit with only the automated changes from this PR.

Read more about updating strings on the wiki,

• localization-administration
• download-localized-strings