Preload

[balloob]

Breaking change

Proposed change

Was doing some performance profiling and I realized that our type=module loads the imports in a waterfall!

Now that's not cool! This PR adds app.js also as a preload tag so it is fetched as soon as possible.

I've also made the Roboto preloads conditional, it will only load if it's not Android, because we know for sure that Roboto is available there.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New feature (thank you!)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Example configuration

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue:
• Link to documentation pull request:

Checklist

• The code change is tested and works locally.
• There is no commented out code in this PR.
• Tests have been added to verify that the new code works.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated for www.home-assistant.io