Pinning functionality and highlighting quick wins for reviewers

[dchen97]

Platform
Oppia Web

Describe the request
Allow for reviewers to pin / unpin a lesson that they were working on so they can easily pick up where they left off.

Adjust the UI so reviewers can quickly identify "short" or easier lessons to review to get a "quick win" by completely reviewing a lesson.

Context for the request
New features that would enable us to streamline the contributor dashboard review process. Currently, it can be difficult for a reviewer to identify and/or continue reviewing translations.

Link to PRD
PRD

Information about deadlines/priorities
Not time sensitive but would be helpful to streamline the Contributor Dashboard reviewer process.

DESIGN APPROVAL CHECKLIST - DO NOT EDIT THE FOLLOWING --- ONLY REVIEWERS SHOULD EDIT THE FOLLOWING WHEN THEY APPROVE

• UX Design approved (tag @jennyjae once ready for UXD review)

• UX Writing approved (tag @danapj once ready for UXW review)

• Product approved (tag @dchen97 (for web projects) or @seanlip (for Android projects) once ready for product review)

Design project is not complete until all of the above approvals are complete

[sagangwee]

Noting that these mocks will be need for the GSoC project https://github.com/oppia/oppia/wiki/Google-Summer-of-Code-2023#23-improvements-for-translation-reviewer-experience (wiki link being updated).

[dchen97]

Issue filed - oppia/oppia#17647

[sagangwee]

@dchen97 I'm not seeing a UI change for identifying "short" translations: https://www.figma.com/file/OKGNmo22luDyANM5wwn52S/Oppia-Contributor-Dashboard-Translation-Reviewer-%5Bv01%5D?node-id=281-1521&t=zvGSKeangtsAPANE-0. Am I missing something here?

[dchen97]

It’s the tasks remaining tooltip