Add own control buttons for element-call (#2744)

* 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

src/app/features/call/styles.css.ts

@@ -18,3 +18,7 @@ export const ControlDivider = style({
 export const CallMemberCard = style({
   padding: config.space.S300,
 });
+
+export const CallControlContainer = style({
+  padding: config.space.S400,
+});