jquery-ui relies on jquery being loaded first.
Previous order doesn't play nice with modules that rely on jquery-ui.

- Base.twig updated

Restore the possibility to use the old ui.

No need to have a postload for clipboard.js in templates.
Use the class "clipboard-btn" and match the data-clipboard-target with the right ID
(or other DOM-element).

- After adding padding and margin to the paragraph the footer was
no longer working properly.
- Paragraph in the footer changes to a div.

- Add class pure-button-red instead of overwriting primary
- Create a group of 2 button-elements where one is hollow, useful
to show input-files or error-ids.
- Update templates accordingly