Allow filtering room list during treeview navigation (#7219)

test/accessibility/RovingTabIndex-test.tsx

@@ -45,6 +45,11 @@ const button2 = <Button key={2}>b</Button>;
 const button3 = <Button key={3}>c</Button>;
 const button4 = <Button key={4}>d</Button>;
 
+// mock offsetParent
+Object.defineProperty(HTMLElement.prototype, "offsetParent", {
+    get() { return this.parentNode; },
+});
+
 describe("RovingTabIndex", () => {
     it("RovingTabIndexProvider renders children as expected", () => {
         const wrapper = mount(<RovingTabIndexProvider>