feat(iframeAPI): implement avatar change commands

fix(filmstrip_only): Remove unrelated UI elements

fix(filmstrip_only): JS errors

Fixes and adjustments of UI layout

Merge branch 'BeatC-moving-conference-init-to-react-1' of https://github.com/BeatC/jitsi-meet into BeatC-BeatC-moving-conference-init-to-react-1

Merge branch 'no-welcome-autofocus' of https://github.com/saghul/jitsi-meet into saghul-no-welcome-autofocus

Now that Apple have approved build 1.0.178 for release in the App Store,
the short app version needs to be incremented; otherwise, no new builds
can be uploaded to TestFlight and, respectively, for release in the App
Store.

This prevents the keyboard from showing up right when the app opens.

Fix(RemoteVideo): Fixes remote video menu icon

Adds an option to show watermark only for guests.

Removes guest parameter when navigating to close page.

Using sessionStorage to save whether user is guest or not.