feat: Adds interface config to hide lobby button. (#7619)

* feat: Adds interface config to hide lobby button.

* squash: Moves the config to config.js and add it to mobile.

config.js

     // UI
     //
 
+    // Hides lobby button
+    // hideLobbyButton: false,
+
     // Require users to always specify a display name.
     // requireDisplayName: true,
 

react/features/connection-stats/components/ConnectionStatsTable.js

 
     /**
      * Creates a a table row as a ReactElement for displaying codec, if present.
-     * This will typically be something like "Codecs (A/V): opus, vp8".
+     * This will typically be something like "Codecs (A/V): Opus, vp8".
      *
      * @private
      * @returns {ReactElement}

react/features/lobby/components/native/LobbyModeButton.js

 export function _mapStateToProps(state: Object): $Shape<Props> {
     const conference = getCurrentConference(state);
     const { lobbyEnabled } = state['features/lobby'];
+    const { hideLobbyButton } = state['features/base/config'];
     const lobbySupported = conference && conference.isLobbySupported();
 
     return {
         lobbyEnabled,
-        visible: lobbySupported && isLocalParticipantModerator(state)
+        visible: lobbySupported && isLocalParticipantModerator(state) && !hideLobbyButton
     };
 }
 

react/features/lobby/components/web/LobbySection.js

  */
 function mapStateToProps(state: Object): $Shape<Props> {
     const { conference } = state['features/base/conference'];
+    const { hideLobbyButton } = state['features/base/config'];
 
     return {
         _lobbyEnabled: state['features/lobby'].lobbyEnabled,
         _visible: conference && conference.isLobbySupported() && isLocalParticipantModerator(state)
+            && !hideLobbyButton
     };
 }