[ESD-10373] Fix rendering of Lock inside popup on first open

[stevehobbsdev]

Changes

Fixes #1942, where the Lock sometimes does not render properly when first
opened on Safari. It was found that the logo image sometimes causes this
behaviour and removing it from the UI causes the issue to go away completely.

The fix in this PR is to cause Safari to redraw by specifying
a non-consequential font size change when the logo image is loaded. In my
testing, this appears to fix the issue.

Prior to the fix, this can be reproduced fairly reliably (50% of the time by my
reckoning) by:

• Open the Lock UI in a popup in Safari
• Open developer tools and ensure network caching is off
• Continually refresh the popup content using Cmd+R
• Observe that sometimes the Lock will render properly, sometimes not

References

#1942

Testing

Please describe how this can be tested by reviewers. Be specific about anything not tested and reasons why. If this library has unit and/or integration testing, tests should be added for new functionality and existing tests should complete without errors.

• This change adds unit test coverage
• This change adds integration test coverage
• This change has been tested on the latest version of the platform/language

Checklist

• I have read the Auth0 general contribution guidelines
• I have read the Auth0 Code of Conduct
• All existing and new tests complete without errors
• All code quality tools/guidelines have been run/followed
• All relevant assets have been compiled
• All active GitHub checks have passed