* feat(prejoin/native): clear notifications when joining

Co-authored-by: robertpin <robert.pin9@gmail.com>
Co-authored-by: Gabriel Borlea <gabriel.borlea@8x8.com>

* fix: When adding a room param to urls check for previous params.

* squash: Uses URL object to modify the url.

* squash: Use common connection options from base/connection.

Normalizes bosh url and for web.

* squash: Adds release param to external api and handles it.

* feat: Adds release handling for mobile(links in welcome page).

* squash: Fixes comments.

* feat(prejoin) created native Prejoin screen

* feat(prejoin) fixed useState callback and updates warnings

* feat(prejoin) created styles file

* feat(prejoin) moved nav from middleware to appNavigate, created native DeviceStatus

* feat(prejoin) updated styles

* feat(prejoin) review remarks pt. 1

* feat(prejoin) removed unused styles

* feat(prejoin) review remarks pt. 2

* feat(prejoin) comment fix

* feat(prejoin) added header title

* feat(prejoin) review remarks

* feat(lobby) updated styles

* feat(prejoin) updated lobby screen header button functionality

* feat(prejoin) review remarks pt 3

* feat(welcome) removed VideoSwitch component

* feat(mobile/navigation) fixed linter

* feat(welcome) moved isWelcomePageEnabled to functions.ts

* feat(mobile/navigation) screen options and order updates

* feat(app) review remark

* feat(welcome) added translation for screen header title and fixed build

* feat(mobile/navigation) added screen title translation and created screen option

* feat(mobile/navigation) fixed screenOptions import

* feat(mobile/navigation) added DialInSummary title translation, fixed animation and close button

* feat(welcome) fixed build

* feat(welcome) removed extra check

* feat(prejoin) review remarks pt 4

* feat(prejoin) added Join in low bandwidth mode btn

* feat(welcome) changed welcome screen header title

* fixup lobby close

Converted LoadConfigOverlay to a JitsiScreen component that right now is part of navigation as ConnectingPage, plus I
separated appNative and other actions into web and native.

As an intermediate step on the path to merging jitsi-meet and
jitsi-meet-react, import the whole source code of jitsi-meet-react as it
stands at
2f23d98424
i.e. the lastest master at the time of this import. No modifications are
applied to the imported source code in order to preserve a complete
snapshot of it in the repository of jitsi-meet and, thus, facilitate
comparison later on. Consequently, the source code of jitsi-meet and/or
jitsi-meet-react may not work. For example, jitsi-meet's jshint may be
unable to parse jitsi-meet-react's source code.