New template created

- Transform it into HTML5 component detail + summary.
- Add/remove styles.
- Add "animation" on menu-header
- Make it clear for keyboard users + some accessibility.
- Refactoring, code moved.
- Add JS.

Add it in dependencies
Add styles

Fixed responsive issue on counter in /members page
Had to modify some CSS files, create templates, modify data-fields in sib-display, clean up and refactor
Removed custom-widgets

New CSS rules added, HTML has been modified.

Closes #54