Improvements - Fluid Topics - 5.1

Improves the accessibility of the Viewer page by adding an <h1> element.

Improves the accessibility of the Viewer page by removing an <ul> element which could be empty.

Improves the accessibility of the Viewer page by adding a role="main" attribute.

Adds the Theme studio menu.

Documentation links: Design themes 

Makes the Header designer a beta feature.

Removes the NEW tag on the Vertical tabs and Horizontal tabs components.

Removes the Search improvements feature toggle and the legacy search bar in classic homepages (available when the toggle was off).