template/element polyfill styling need !important

[ebidel]

platform.js injects this into the head of the page:

template, element {
  display: none;
}

However, selectors later on can override the display property, rendering these elements:

div > * {
  display: inline-block;
}

The injection should use:

template, element {
  display: none !important;
}

[ebidel]

Fixed in googlearchive/platform@abd3c8c