Add sort drop for list search page

### Feature Request

## Problem / Opportunity

Problem:
Problem is that Patrons that try to look for Lists can be presented with an order that they may not understand and may provoque difficulty when looking for a List.

Why work on this?
This will help Patrons access to Lists and Series in a better and more organized way making easier to maintain, add books to the desire List

Success:
Patrons will have a better access to Lists and Series, and sorting will be available
## Proposal

Brief overview:
A button will be added to the top of the list search page with 2 sorting options by Relevance and Recently Modified. Similar to the existing sorting on Books search page.

Page where the Sorting option will be

Example on how the button will look:

### Breakdown

Implementation Details (for maintainers)

#### Related files

Refer to [this map of common Endpoints](https://docs.openlibrary.org/developers/backend/endpoints.html):
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#### Requirements Checklist
Checklist of requirements that need to be satisfied in order for this issue to be closed:
* [ ]

#### Stakeholders

* @cdrini

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