Add a button to the dev server to facilitate easy testing of unloading
and re-loading the client, as done by the browser extension and also
some third-party pages.

Ensure that all links, script and stylesheet elements added to the page
by the boot script are removed when the client is unloaded.

This fixes a problem where the recently added `<link>` for the notebook
app was not removed when the page was unloaded, causing attempts to
activate the browser extension on a page where the client had previously
been loaded and then removed, to fail.

The implementation works by tagging all elements with a
`hypothesis-asset` attribute in the boot script and then removing these
elements when the client is unloaded.

On mobile devices, reseting the zoom level (pinch gesture) leaves a one pixel gap between the bucket-bar and the iframe. By adding one extra pixel to the width of the bucket-bar we eliminate this issue.

Add a pressure valve to keep from loading too many annotations in groups
that have a large number of annotations.

Replace iframe in `Notebook` if `groupId` changes

`load` was written with `SidebarView` in mind, assuming the presence
of both a `groupId` and one or more `uris`. This allows the loading of
all annotations that pertain to a specific group on one or more
specific document URIs.

For Notebook, we'd like to be able to, initially, load all annotations
for a `group` but for all document URIs.

Make `load` take `options` instead of individual search arguments. Leave
requirement for a `groupId` in place for now.

Bumps [postcss](https://github.com/postcss/postcss) from 8.1.9 to 8.1.10.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/master/CHANGELOG.md)
- [Commits](https://github.com/postcss/postcss/compare/8.1.9...8.1.10)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [prettier](https://github.com/prettier/prettier) from 2.2.0 to 2.2.1.
- [Release notes](https://github.com/prettier/prettier/releases)
- [Changelog](https://github.com/prettier/prettier/blob/master/CHANGELOG.md)
- [Commits](https://github.com/prettier/prettier/compare/2.2.0...2.2.1)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [autoprefixer](https://github.com/postcss/autoprefixer) from 10.0.2 to 10.0.4.
- [Release notes](https://github.com/postcss/autoprefixer/releases)
- [Changelog](https://github.com/postcss/autoprefixer/blob/master/CHANGELOG.md)
- [Commits](https://github.com/postcss/autoprefixer/compare/10.0.2...10.0.4)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

This is part of changing the annotator code to use a single
well-tested/debugged/optimized etc. implementation of Range <-> text offset
conversion in all places.

This will be useful for switching the position selector anchoring code to use the
`TextRange` class. The one place where a non-Element node was passed was
from `anchoring/pdf.js`, a context where we can easily create a dummy
element.

Bumps [core-js](https://github.com/zloirock/core-js) from 3.7.0 to 3.8.0.
- [Release notes](https://github.com/zloirock/core-js/releases)
- [Changelog](https://github.com/zloirock/core-js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/zloirock/core-js/compare/v3.7.0...v3.8.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [@sentry/browser](https://github.com/getsentry/sentry-javascript) from 5.27.5 to 5.27.6.
- [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/5.27.5...5.27.6)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [postcss-url](https://github.com/postcss/postcss-url) from 10.1.0 to 10.1.1.
- [Release notes](https://github.com/postcss/postcss-url/releases)
- [Changelog](https://github.com/postcss/postcss-url/blob/master/CHANGELOG.md)
- [Commits](https://github.com/postcss/postcss-url/compare/10.1.0...10.1.1)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [terser](https://github.com/terser/terser) from 5.5.0 to 5.5.1.
- [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/v5.5.0...v5.5.1)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [@babel/core](https://github.com/babel/babel/tree/HEAD/packages/babel-core) from 7.12.7 to 7.12.9.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/main/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/commits/v7.12.9/packages/babel-core)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [aws-sdk](https://github.com/aws/aws-sdk-js) from 2.792.0 to 2.799.0.
- [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/v2.792.0...v2.799.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [typescript](https://github.com/Microsoft/TypeScript) from 4.0.5 to 4.1.2.
- [Release notes](https://github.com/Microsoft/TypeScript/releases)
- [Commits](https://github.com/Microsoft/TypeScript/compare/v4.0.5...v4.1.2)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [prettier](https://github.com/prettier/prettier) from 2.1.2 to 2.2.0.
- [Release notes](https://github.com/prettier/prettier/releases)
- [Changelog](https://github.com/prettier/prettier/blob/master/CHANGELOG.md)
- [Commits](https://github.com/prettier/prettier/compare/2.1.2...2.2.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

On mobile device `@media (pointer: coarse)` is active which make the buttons larger, including those in the `annotator-toolbar`.

By making the sidebar smaller we avoid cropping the buttons outside the screen.

On mobile screen sizes, buttons get a minimum recommended size (following Apple's Human Interface Guidelines). To accomodate for that, `top-bar` height and `annotator-toobar` width needs to be adjusted accordingly.

Bumps [@sentry/browser](https://github.com/getsentry/sentry-javascript) from 5.27.4 to 5.27.5.
- [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/5.27.4...5.27.5)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [puppeteer](https://github.com/puppeteer/puppeteer) from 5.4.1 to 5.5.0.
- [Release notes](https://github.com/puppeteer/puppeteer/releases)
- [Changelog](https://github.com/puppeteer/puppeteer/blob/main/CHANGELOG.md)
- [Commits](https://github.com/puppeteer/puppeteer/compare/v5.4.1...v5.5.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [terser](https://github.com/terser/terser) from 5.3.8 to 5.5.0.
- [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/v5.3.8...v5.5.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [fetch-mock](https://github.com/wheresrhys/fetch-mock) from 9.10.7 to 9.11.0.
- [Release notes](https://github.com/wheresrhys/fetch-mock/releases)
- [Commits](https://github.com/wheresrhys/fetch-mock/compare/v9.10.7...v9.11.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [axe-core](https://github.com/dequelabs/axe-core) from 4.0.2 to 4.1.1.
- [Release notes](https://github.com/dequelabs/axe-core/releases)
- [Changelog](https://github.com/dequelabs/axe-core/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/dequelabs/axe-core/compare/v4.0.2...v4.1.1)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [postcss](https://github.com/postcss/postcss) from 8.1.7 to 8.1.9.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/master/CHANGELOG.md)
- [Commits](https://github.com/postcss/postcss/compare/8.1.7...8.1.9)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

This name better describes this component's role.

Bumps [@babel/preset-env](https://github.com/babel/babel/tree/HEAD/packages/babel-preset-env) from 7.12.1 to 7.12.7.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/main/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/commits/v7.12.7/packages/babel-preset-env)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [eslint](https://github.com/eslint/eslint) from 7.13.0 to 7.14.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](https://github.com/eslint/eslint/compare/v7.13.0...v7.14.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [@babel/preset-react](https://github.com/babel/babel/tree/HEAD/packages/babel-preset-react) from 7.12.5 to 7.12.7.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/main/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/commits/v7.12.7/packages/babel-preset-react)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [@babel/core](https://github.com/babel/babel/tree/HEAD/packages/babel-core) from 7.12.3 to 7.12.7.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/main/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/commits/v7.12.7/packages/babel-core)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Both are functionally equivalent in this code, but we're using `Object<K,V>`
elsewhere, so prefer that for consistency.