Move the CSS styles into the module that corresponds to the component
where they are used.

Instead of passing a `searchController` prop into `TopBar` which is
responsible for reading and updating the search query, from different
sources depending on whether this is the sidebar or stream, handle
reading/updating the search from within `TopBar` itself:

 - In the sidebar, read/update the filter query in the store
 - In the stream, render a `StreamSearchInput` control which
   reads/updates the "$q" param from the Angular `$location` service

This removes some indirection and makes it easier to follow where the
search input gets its data from and what happens when it is changed.

Also fix a bug where existing annotations were not cleared after a route
change from `/a/:id` to `/stream?q={query}`.

This provides more runtime-checked documentation about what these props
look like.

If there was not enough space for all of the items in the top bar, the
group name could end up wrapping. This tended to happen when the group
name was long, the sidebar was narrow and the search input was active.

Since this component is no longer referenced within an Angular template,
the arguments no longer have to be named as properties in an object.

 - Replace `h-branding` with `applyTheme` utility

 - Replace `h-tooltip` with standard tooltips using the `title`
   attribute, which matches other icons in the top bar

 - Fix a double-quoted string after `<svg-icon>` in an Angular template
   was converted to `<SvgIcon ...>` in JSX

 - Convert `<top-bar>` component to Preact
 - Add additional tests for top bar in different states
 - Remove `<login-control>` component. This has been inlined into `TopBar`
 - Remove unused component wrappers for components that are no longer
   referenced from Angular templates

Only emit end if searchClient is done searching

Add self-closing ESlint enforcement

Previously `end` was emitted after each getBatch call in the
searchClient, now it is emitted once after all batches are
complete.

Add loading of annotations state to store

Bump npm-packlist from 1.4.1 to 1.4.4

Bump eslint-plugin-react-hooks from 1.6.0 to 1.6.1

Bump eslint-plugin-react from 7.14.1 to 7.14.2

Bumps [npm-packlist](https://github.com/npm/npm-packlist) from 1.4.1 to 1.4.4.
- [Release notes](https://github.com/npm/npm-packlist/releases)
- [Commits](https://github.com/npm/npm-packlist/compare/v1.4.1...v1.4.4)
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 1.6.0 to 1.6.1.
- [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 [eslint-plugin-react](https://github.com/yannickcr/eslint-plugin-react) from 7.14.1 to 7.14.2.
- [Release notes](https://github.com/yannickcr/eslint-plugin-react/releases)
- [Changelog](https://github.com/yannickcr/eslint-plugin-react/blob/master/CHANGELOG.md)
- [Commits](https://github.com/yannickcr/eslint-plugin-react/compare/v7.14.1...v7.14.2)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Add react moderation banner component

Break out `annotation-user` component from `annotation-header`

Rename group-list-v2 => group-list

Now that the old group list/menu has been removed, rename the new
version so that the file name matches the component name.

Always use main URL from main frame when searching for groups

Remove old dropdown menu implementation

Remove old groups menu and "community_groups" feature flag checks

This was used by the old dropdown menus.

The corresponding JS component was removed as part of the recent
redesign of the groups menu.

The new groups list implementation is still in `groups-list-v2.js`
rather than renaming the file to avoid the diff being too confusing.
Renaming it to remove the "-v2" suffix will happen in a follow-up
commit.

Use Prettier to auto-format .scss files