Add Quant admin tab with metadata for configured pages

Reword from "page info" to "metadata".

Kristen Pol → credited steveworley → .

This was added here:

https://github.com/quantcdn/drupal/pull/202

See the screenshots there for how the pages look. They are sub-tabs under /admin/config/quant/metadata.

Automatically closed - issue fixed for 2 weeks with no activity.

Part of 1.6.0 release → .