The way that the search interface is currently implemented,
clicking on the "search" icon in the top bar actually
submits the search form (with an empty query).

Ignoring empty queries if a query has not yet been set
alleviates "searching" for nothing.

This also prevents expanded threads from being re-collapsed
when clicking on the search icon.

Bumps [elliptic](https://github.com/indutny/elliptic) from 6.5.2 to 6.5.3. **This update includes a security fix.**
- [Release notes](https://github.com/indutny/elliptic/releases)
- [Commits](https://github.com/indutny/elliptic/compare/v6.5.2...v6.5.3)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

- add props for annotation-action-bar
- add props for annotation-document-info
- dependency fixes:
  - add selector types for groups stores
  - fixup errors discovered in annotation-share-control
  - fixup errors in util/permissions

This causes several issues and its not immediately clear this needs or should be required

Naming the variable `createElement` caused a crash when running `yarn
lint` with eslint-plugin-react v7.20.4, presumably because it was being
treated like the `createElement` import from Preact/React.

Bumps [eslint-plugin-react](https://github.com/yannickcr/eslint-plugin-react) from 7.20.3 to 7.20.4.
- [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/v7.20.3...v7.20.4)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [fetch-mock](https://github.com/wheresrhys/fetch-mock) from 9.10.4 to 9.10.5.
- [Release notes](https://github.com/wheresrhys/fetch-mock/releases)
- [Commits](https://github.com/wheresrhys/fetch-mock/compare/v9.10.4...v9.10.5)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [commander](https://github.com/tj/commander.js) from 5.1.0 to 6.0.0.
- [Release notes](https://github.com/tj/commander.js/releases)
- [Changelog](https://github.com/tj/commander.js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/tj/commander.js/compare/v5.1.0...v6.0.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [puppeteer](https://github.com/puppeteer/puppeteer) from 5.1.0 to 5.2.1.
- [Release notes](https://github.com/puppeteer/puppeteer/releases)
- [Commits](https://github.com/puppeteer/puppeteer/compare/v5.1.0...v5.2.1)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [codecov](https://github.com/codecov/codecov-node) from 3.7.1 to 3.7.2.
- [Release notes](https://github.com/codecov/codecov-node/releases)
- [Commits](https://github.com/codecov/codecov-node/compare/v3.7.1...v3.7.2)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [@sentry/browser](https://github.com/getsentry/sentry-javascript) from 5.19.2 to 5.20.1.
- [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/5.19.2...5.20.1)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [@octokit/rest](https://github.com/octokit/rest.js) from 18.0.1 to 18.0.3.
- [Release notes](https://github.com/octokit/rest.js/releases)
- [Commits](https://github.com/octokit/rest.js/compare/v18.0.1...v18.0.3)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [aws-sdk](https://github.com/aws/aws-sdk-js) from 2.715.0 to 2.720.0.
- [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/v2.715.0...v2.720.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

- Add types for each store including most of their selectors and actions.
- Not every selector and action is completed, but this covers most of them and serves as a first step to typing all the selectors / actions

Generalize the code for converting URLs of the form
`https://<hostname>/<path containing a video ID>` into media player
iframes and add support for Flipgrid videos.

Fixes https://github.com/hypothesis/product-backlog/issues/1125

Avoid video embeds being cut off in narrow viewports

- Add tests for `useRootThread`, using `threadAnnotations`

This functionality is now handled by a util

* Establish a `root-thread` utility that is pure and takes its state
  as a single argument; wrap with `memoize` and export
* Create a memoized rootSelector in the `selection` module that composes
  the state needed by the `root-thead` utility
* The `useRootThread` hook uses the selector and the `root-thread` util

Refactor root-thread usage by UI components to be via a preact hook

Embeds can end up taking up a lot of screen space in the single
annotation view and stream on desktop, so cap their width. Unfortunately
this has to be done in a slightly roundabout way due to the way that the
height of video embeds is set.

Previously video embeds were given a fixed with of 369px, which is close
to the width available to annotation content at the sidebar's default width
(~380px). On narrower viewports the video would get cut off.

Fix this by setting the width of video embeds to `100%` and using a CSS
hack [1] to set the height of the video such that the embed has a 16:9
aspect ratio, which is what YouTube optimizes for.

 - Set `width: 100%` on `excerpt__content` and `markdown-view` so that
   the annotation content always fills the available width.

 - Add support for specifying a class name for embed containers when
   calling `replaceLinksWithEmbeds` and use that to give embeds rendered
   in `MarkdownView` a `width` of 100%.

 - Change `replaceLinksWithEmbeds` to wrap iframes with an aspect-ratio
   box (see [1]) which causes the iframe's height to be adjusted as the
   width changes to have a 16:9 aspect ratio.

   Adding this container required changes in `media-embedder-test` to
   allow the `<iframe>` to be wrapped in a container element.

[1] https://css-tricks.com/aspect-ratio-boxes/

- TagList
- TagEditor
- MarkdownEditor
- Excerpt
- AutocompleteList
- AnnotationBody

Add SidebarStore type. This is an aggregation of the base ReduxStore + each one of our stores baked in. The fist store added here is simply the Activity store (as a first example)

There are some assumptions when making store types:

1. It is assumed they are transformed in `createStore` where the selectors and actions are flattened.

2. Some meta data (namely, the init method, namespace and update method) are refactored or removed.

These transformations are implied through the typing which explicitly ignores these methods and structure of the raw store before the transformation in create-store.

Bump codecov from 3.7.0 to 3.7.1

Convert store selectors to receive local rather than root state

Since selectors are attached to the `store` as methods, selectors from
different modules are not allowed to have the same name.