Replace the "Primary menu" component with a reusable component in Bartik.

Follow-up to #1342054: [META] Clean up templates and CSS →

Problem/Motivation

1. Bartik's template files need to be assessed and cleaned up of redundant markup, bad formatting and ID's.
2. Bartik's CSS files need to follow Drupal's CSS Coding Standards → .

Proposed resolution

For this issue we take "primary-menu.css" within Bartik in css/components/primary-menu.css plus any template file associated with the CSS and clean them up.

Remaining tasks

• Write a patch containing as much as the above as possible.
• Post a patch with screenshots.
• Visual review of a patch - check the secondary menu visually with and without patch applied. Take screenshots.
• Code review of a patch - check the code follows coding standards, suggest improvements if needed in a comment.
• Produce a new patch with improvements if needed.

User interface changes

None

API changes

None

Data model changes

None

Beta phase evaluation