Add outline:none to .dialog
Add outline:none to .dialog

Closes #10536

Auditors:

Test Plan:
1. Open brave.com
2. Click the lion icon
3. Make sure the focus ring around the browser's window does not appear

diasdavid/browser-laptop,luixxiul/browser-laptop,luixxiul/browser-laptop,luixxiul/browser-laptop,diasdavid/browser-laptop,diasdavid/browser-laptop,luixxiul/browser-laptop,diasdavid/browser-laptop