Fix siteInfo dialog width bug

[luixxiul]

Fixes #10930

Auditors:

Test Plan:

1. Open https://mixed-script.badssl.com/
2. Click the lock icon
3. Make sure the width of dialog is 500px

Submitter Checklist:

• Submitted a ticket for my issue if one did not already exist.
• Used Github auto-closing keywords in the commit message.
• Added/updated tests for this change (for new code or code which already has tests).
• Ran git rebase -i to squash commits (if needed).
• Tagged reviewers and labelled the pull request as needed.

Test Plan:

Reviewer Checklist:

Tests

• Adequate test coverage exists to prevent regressions
• Tests should be independent and work correctly when run individually or as a suite ref
• New files have MPL2 license header

[NejcZdovc]

++

[NejcZdovc]

master f39ba1f
0.20.x 8aca32f
0.19.x f0f13d0