* add mutation observer hok
* add hook to read speaking member by observing iframe content
* display speaking member name in call status bar and improve layout
* fix shrining
* add joined call control bar
* remove chat toggle from room header
* change member speaking icon to mic
* fix joined call control appear in other
* show spinner on end call button
* hide call statusbar for mobile view when room is selected
* make call statusbar more mobile friendly
* fix call status bar item align
