when retractions are restricted to mods only

Bumps [@fortawesome/fontawesome-free](https://github.com/FortAwesome/Font-Awesome) from 5.9.0 to 5.13.0.
- [Release notes](https://github.com/FortAwesome/Font-Awesome/releases)
- [Changelog](https://github.com/FortAwesome/Font-Awesome/blob/master/CHANGELOG.md)
- [Commits](https://github.com/FortAwesome/Font-Awesome/compare/5.9.0...5.13.0)
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Fixes a bug that prevented scrolling from working correctly

Rename CSS class to conform to convention

Bumps [npm](https://github.com/npm/cli) from 6.13.4 to 6.14.2.
- [Release notes](https://github.com/npm/cli/releases)
- [Changelog](https://github.com/npm/cli/blob/latest/CHANGELOG.md)
- [Commits](https://github.com/npm/cli/compare/v6.13.4...v6.14.2)
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Bumps [acorn](https://github.com/acornjs/acorn) from 6.2.0 to 6.4.1.
- [Release notes](https://github.com/acornjs/acorn/releases)
- [Commits](https://github.com/acornjs/acorn/compare/6.2.0...6.4.1)
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Bumps [minimist](https://github.com/substack/minimist) from 1.2.0 to 1.2.2.
- [Release notes](https://github.com/substack/minimist/releases)
- [Commits](https://github.com/substack/minimist/compare/1.2.0...1.2.2)
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`.forEach` on a Collection no longer returns the models, so need to
update some tests.

Queue messages and handle them sequentially, each time waiting for promises to
resolve before handling the next message.

Updates #1899, which likely happens because an error message is received
before messages have been fetched.

To avoid one test which times out, causing subsequent tests to not be
run (and therefore also time out).

Otherwise we run into race conditions while testing

In order to give plugins time to properly clear data from the browser storage.