FRE-600: Fix code review blockers

- Consolidated duplicate UndoManagers to single instance
- Fixed connection promise to only resolve on 'connected' status
- Fixed WebSocketProvider import (WebsocketProvider)
- Added proper doc.destroy() cleanup
- Renamed isPresenceInitialized property to avoid conflict

Co-Authored-By: Paperclip <noreply@paperclip.ing>

node_modules/browser-tabs-lock/processLock.d.ts

@@ -0,0 +1,11 @@
+declare class ProcessLocking {
+    static instance: undefined | ProcessLocking;
+    private locked;
+    static getInstance(): ProcessLocking;
+    private addToLocked;
+    isLocked: (key: string) => boolean;
+    lock: (key: string) => Promise<void>;
+    unlock: (key: string) => void;
+}
+export default function getLock(): ProcessLocking;
+export {};