Better handle favicon for Gmail

[timeowilliams]

Describe the bug

For mail.google.com (Gmail) > let's handle separately and render the Gmail icon.

Used Scaffolding

create-electron

Used Package Manager

npm

Validations

• Follow the Code of Conduct.
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.