Make shortcut keys available with `metaKey` as well as `ctrlKey`

Update keypress handling to recognize `CMD/META+key` as well as
`CTRL+key`. Very nice for the Mac users.

Change highlight announcement text to "annotation start"

Add reply and collapsed classnames to `AnnotationOmega`

Move last remaining module out of src/sidebar/directive/test

Bump fetch-mock from 8.3.2 to 9.0.0

Bump terser from 4.6.3 to 4.6.4

Bump preact from 10.3.2 to 10.3.3

Bump @sentry/browser from 5.12.4 to 5.13.0

Bump sass from 1.25.0 to 1.26.2

Bump mocha from 7.0.1 to 7.1.0

Mirror the current implementation in `Annotation` and `AnnotationThread`
for applying stateful CSS classes to `AnnotationOmega` elements. This
approach should be reviewed after migration is complete.

Fixes #1837

Bumps [@babel/core](https://github.com/babel/babel) from 7.8.4 to 7.8.6.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/master/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/compare/v7.8.4...v7.8.6)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [@babel/preset-env](https://github.com/babel/babel) from 7.8.4 to 7.8.6.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/master/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/compare/v7.8.4...v7.8.6)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [mocha](https://github.com/mochajs/mocha) from 7.0.1 to 7.1.0.
- [Release notes](https://github.com/mochajs/mocha/releases)
- [Changelog](https://github.com/mochajs/mocha/blob/master/CHANGELOG.md)
- [Commits](https://github.com/mochajs/mocha/compare/v7.0.1...v7.1.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [eslint-plugin-react-hooks](https://github.com/facebook/react/tree/HEAD/packages/eslint-plugin-react-hooks) from 2.4.0 to 2.5.0.
- [Release notes](https://github.com/facebook/react/releases)
- [Changelog](https://github.com/facebook/react/blob/master/CHANGELOG.md)
- [Commits](https://github.com/facebook/react/commits/HEAD/packages/eslint-plugin-react-hooks)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [aws-sdk](https://github.com/aws/aws-sdk-js) from 2.624.0 to 2.630.0.
- [Release notes](https://github.com/aws/aws-sdk-js/releases)
- [Changelog](https://github.com/aws/aws-sdk-js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/aws/aws-sdk-js/compare/v2.624.0...v2.630.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [sass](https://github.com/sass/dart-sass) from 1.25.0 to 1.26.2.
- [Release notes](https://github.com/sass/dart-sass/releases)
- [Changelog](https://github.com/sass/dart-sass/blob/master/CHANGELOG.md)
- [Commits](https://github.com/sass/dart-sass/compare/1.25.0...1.26.2)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [@sentry/browser](https://github.com/getsentry/sentry-javascript) from 5.12.4 to 5.13.0.
- [Release notes](https://github.com/getsentry/sentry-javascript/releases)
- [Changelog](https://github.com/getsentry/sentry-javascript/blob/master/CHANGELOG.md)
- [Commits](https://github.com/getsentry/sentry-javascript/compare/5.12.4...5.13.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [preact](https://github.com/preactjs/preact) from 10.3.2 to 10.3.3.
- [Release notes](https://github.com/preactjs/preact/releases)
- [Commits](https://github.com/preactjs/preact/compare/10.3.2...10.3.3)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [terser](https://github.com/terser/terser) from 4.6.3 to 4.6.4.
- [Release notes](https://github.com/terser/terser/releases)
- [Changelog](https://github.com/terser/terser/blob/master/CHANGELOG.md)
- [Commits](https://github.com/terser/terser/compare/v4.6.3...v4.6.4)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [fetch-mock](https://github.com/wheresrhys/fetch-mock) from 8.3.2 to 9.0.0.
- [Release notes](https://github.com/wheresrhys/fetch-mock/releases)
- [Commits](https://github.com/wheresrhys/fetch-mock/compare/v8.3.2...v9.0.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Fixes #1817

Add save-with-key-combo support to `AnnotationOmega`

Fix page note initial tab selection when there are replies in the mix

Move Angular component testing utilities into
src/sidebar/components/test and rename the module to make it clear that
it contains Angular-specific code which we can delete once all
components are converted.

Remove non-functional `window-scroll` Angular directive

The /stream view is supposed to automatically fetch new annotations as
you scroll. However this has been broken for a very long time. The
code responsible for making this happen relied on `scroll` events on the `window`.
However the stream content has for a long time been contained in a scrollable
`.app-content-wrapper` container, so no such events were emitted.

For the moment, just remove the non-functional code as that gets us a
step closer to completing the migration away from Angular.

Remove h-branding Angular directive

After the previous commit, this is no longer used in the app.

Fix top bar failing to display in /stream route

Remove unused Angular filters and directives

Before, the page notes tab would not be selected if any of the page
notes had replies. Now will correctly auto-select page notes tab if
all top-level (i.e. non-reply) annotations are page notes.

Also add some rudimentary tests for the `ADD_ANNOTATIONS` reducer in
the `selection` store module as none existed.

Fixes #1827

This broke in dff1f428 because the
`$location` Angular service became unavailable to the
`StreamSearchInput` component as it was not registered in the new
dependency injection container.

This used to contain Angular filters. The last references to this were
removed in c978b6b2.

These directives were only used inside components that have now been
converted to Preact.

Resolves #1838