Make Recently viewed section of the new search modal scrollable

### Your use case

#### What would you like to do?
If there's more Recently viewed items than can fit on screen, they can be accessed by pressing keyboard arrows but there's no way to access them with a mouse.
#### Why would you like to do it?
I think the modal should be accessible with both a keyboard and a mouse.
#### How would you like to achieve it?
Maybe add a horizontal scroll bar?

### Have you considered any alternatives?

If we don't want a scroll bar, we could implement some clickable arrows, which would allow the user to navigate the Recently viewed section.

### Additional context

This can only be observed if you have more than 9 recently viewed items or you resize your window.