Screensharing rework

Split Linux screensharing audio tracks, Rework screensharing functionality and layout
This will need some refactoring soon

src/app/core/models/index.ts

@@ -182,6 +182,8 @@ export type ChatEventType =
   | 'voice-state-request'
   | 'state-request'
   | 'screen-state'
+  | 'screen-share-request'
+  | 'screen-share-stop'
   | 'role-change'
   | 'room-permissions-update'
   | 'server-icon-summary'
@@ -196,6 +198,7 @@ export type ChatEventType =
 /** Optional fields depend on `type`. */
 export interface ChatEvent {
   type: ChatEventType;
+  fromPeerId?: string;
   messageId?: string;
   message?: Message;
   reaction?: Reaction;