Resolve "Design View: Left/Right keyboard arrows through Designs"

What does this MR do?

This MR implements the possibility to navigate through designs list not only clicking on buttons but also pressing Left/Right keyboard arrows

Screenshots

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers

Related issue #118604 (closed)