Upgrade eslint related packages
Fix new errors

Fix bug introduced via #12994 where id was changed and "-tab" was appended. Due to this the selected tab was not anymore working and empty object was returned here: 05da37b56d/react/features/desktop-picker/components/DesktopPicker.tsx (L270)

Originally part of #13096 by @dudumanbogdan, but pulled ahead to fix application
window sharing via Electron desktop app.

Fixes: jitsi/jitsi-meet-electron#857

Fix imports
Convert some files to TS

Fix imports

Remove unnecessary @ts-ignore
Fix some TS errors

Replace atlaskit Spinner with the new component
Remove @atlaskit/spinner

feat(a11y): use tabs ARIA design pattern when using tabbed UI

Fixes wrong focus on desktop picker dialog

Remove unnecessary @ts-ignores
Remove unnecessary eslint-disable

Remove global variables from files
Change type to interface

Convert some files to TS
Improve Dialog component

Remove atlaskit/checkbox dependency

* Make Jitsi WCAG 2.1 compliant

* Fixed password form keypress handling

* Added keypress handler to name form

* Removed unneccessary dom query

* Fixed mouse hove style

* Removed obsolete css rules

* accessibilty background feature

* Merge remote-tracking branch 'upstream/master' into nic/fix/merge-conflicts

* fix error

* add german translation

* Fixed merge issue

* Add id prop back to device selection

* Fixed lockfile

Co-authored-by: AHMAD KADRI <52747422+ahmadkadri@users.noreply.github.com>

Found via `codespell -q 3 -S ./lang`

React Native doesn't define __filename nor __dirname so do it artisanally. In
addition, this helps with centralizing the configuration passed to loggers.

🔥🔥🔥

For the most part the changes are taking the "static propTypes" declaration off
of components and declaring them as Flow types. Sometimes to support flow some
method signatures had to be added. There are some exceptions in which more had
to be done to tame the beast:
- AbstractVideoTrack: put in additional truthy checks for videoTrack.
- Video: add truthy checks for the _videoElement ref.
- shouldRenderVideoTrack function: Some component could pass null for the
  videoTrack argument and Flow wanted that called out explicitly.
- DisplayName: Add a truthy check for the input ref before acting on it.
- NumbersList: Move array checks inline for Flow to comprehend array methods
  could be called. Add type checks in the Object.entries loop as the value is
  assumed to be a mixed type by Flow.
- AbstractToolbarButton: add additional truthy check for passed in type.

There are (at least) two changes that are breaking:
- defaultTab is gone
- The re-rendering logic looks to have been re-written so that
  passing in a new array of tabs causes a re-render, which can
  reset the currently selected tab.

The fixes involved removing defaultTab from each tab configuration,
as it is no longer respected anyway. Also, instead of letting Tabs
be uncontrolled and allowing it to set its own selected, which
would result in the first tab automatically being selected on
Tabs re-render, use Tabs a controlled prop to dicate which
tab is selected; this is accomplished by specifying a selected
prop.

ESLint 4.8.0 discovers a lot of error related to formatting. While I
tried to fix as many of them as possible, a portion of them actually go
against our coding style. In such a case, I've disabled the indent rule
which effectively leaves it as it was before ESLint 4.8.0.

Additionally, remove jshint because it's becoming a nuisance with its
lack of understanding of ES2015+.

Prepare for React 16.

#1411