* fix(lobby): Inconsistent state after deny and then approve.
Fixes several issues:
- The error on lobby deny is not sticky
- When preJoin is not enabled we were showing conference UI and showing the error, while the participant is denied to enter the meeting.
- There was inconsistent state (after deny we were keeping membersOnly conference state) and when being approved on re-try while being in the meeting, no remote thumbnails are shown although media is flowing.
The scenario is enabling lobby and tryintg to join, denying the first attempt and approving the second one.
* squash: Drop extra hide lobby screen.
* squash: Finish action first before showing the notification.
* feat: Returns an error on join request with no display name.
When someone tries to join a room with lobby enabled and display name is not set returns an error.
* squash: Fixes handling DISPLAY_NAME_REQUIRED with preJoin disabled.
* squash: Fixes mobile build.
* squash: Move isDisplayNameRequired redux state in lobby and introduces isDisplayNameRequiredError.
* squash: Drops unused isDisplayNameRequired.
This was used on showing prejoin when connection was established on showing prejoin. We no longer establish it at that time, so it is not possible to hit it and act on it.
