Design changes

Description

Changing input form design for all features as well as other small design changes for a more consistent design with the entire framework.

Type of PR This PR is an improvement.

Tests

Check if all the elements are aligned properly and the pages have proper headers and if the input forms have a similar design to the example shown below.

Pages to test:

• /admin/artifacts-publications/add
• /admin/artifacts-publications/add/artifact/<publication_id>
• /admin/artifacts-publications/add/publication/<artifact_id>
• /admin/artifacts-publications/edit/<artifact-publication_id>
• /admin/publications/add
• /admin/publications/edit/<publication_id>
• /admin/publications
• /publications/<publication_id>
• /admin/authors
• /authors
• /authors/<author_id>
• /admin/authors/add
• /admin/authors/edit/<author_id>