Implement language picker in code list editor component

[TomasEng]

When the sketches are ready, we need to implement the language picker accordingly. Depending on the details of the sketches, we should choose one of the following paths:

• Create a wrapper component around the current one. This is the cleanest and easiest solution with regards to the React code, but it may make it difficult to implement the design correctly.
• Implement the language picker within the existing component. We should choose this if the design forces us to change the CSS within the component.

This will also require thorough testing with different kinds of languages, including both left-to-right and right-to-left scripts.

Dependencies

• Create sketches for language picker in code list editor #15148