Refactoring + new embedded chat:

* moving conversejs plugin in separate files
* disconnecting embedded chat on navigation-end

conversejs/lib/plugins/window-title.ts

@@ -0,0 +1,21 @@
+export const windowTitlePlugin = {
+  dependencies: ['converse-muc-views'],
+  overrides: {
+    ChatRoomView: {
+      requestUpdate: function (this: any): any {
+        console.log('[livechatWindowTitlePlugin] updating the document title.')
+        try {
+          if (this.model?.getDisplayName) {
+            const title = this.model.getDisplayName()
+            if (document.title !== title) {
+              document.title = title
+            }
+          }
+        } catch (err) {
+          console.error('[livechatWindowTitlePlugin] Failed updating the window title', err)
+        }
+        return this.__super__.requestUpdate.apply(this)
+      }
+    }
+  }
+}