Popover – RawButton wraps Trigger when not needed

# Bug Report

## Expected behavior
When a `` is used with the ``, no `` should wrap it. However, sometimes if an `` or other non-interactive element is used for the trigger, it may still be convenient.

## Current behavior
When the `` is given a `node` as `children`, it will always wrap it with a ``. It's necessary to provide a `function` as `children` to avoid this behaviour.

## Examples
``
https://github.com/acl-services/paprika/pull/113#discussion_r302289468
### 📙 Storybook
http://storybooks.highbond-s3.com/paprika/master

Use the Storybook link in the issue to reproduce the ``/`` behavior and observe current wrapping. Then locate the `Popover.Trigger` implementation and find where node children are automatically wrapped in `RawButton`, adjusting that condition if needed. Check any nearby Popover/trigger stories or tests to keep behavior for non-interactive nodes. Done means button children render without forced `RawButton` wrapping while existing non-button cases still work.

Escrita pelo modelo de indexação a partir do texto da issue.