Update sandbox db.

Add Flag functionality in react

Update node packages.

Update the text in the invite to proposal notification e-mail.

Add icon to share filter state in react

Add the WAGTAILEMBEDS_RESPONSIVE_HTML setting set to true.

Add wagtail-purge, cache CDN purge.

Revert permissions on ReviewerSubmissionDetailView when Reviewer sett…

Add setting for extra text on application landing page.

Add keyboard shortcuts in React 

Bump pillow from 8.1.0 to 8.1.1

Bumps [pillow](https://github.com/python-pillow/Pillow) from 8.1.0 to 8.1.1.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/master/CHANGES.rst)
- [Commits](https://github.com/python-pillow/Pillow/compare/8.1.0...8.1.1

)

Signed-off-by: dependabot[bot] <support@github.com>

Feature: Application summary field & icon to show grouped applications summary in React

Extra text setting user login

Scroll to top while switching submissions

Bump elliptic from 6.5.3 to 6.5.4

Bumps [elliptic](https://github.com/indutny/elliptic) from 6.5.3 to 6.5.4.
- [Release notes](https://github.com/indutny/elliptic/releases)
- [Commits](https://github.com/indutny/elliptic/compare/v6.5.3...v6.5.4

)

Signed-off-by: dependabot[bot] <support@github.com>

Add days to duration block.