Room header UI updates (#11507)

* Fix performance issues with useRoomMembers

With the current implementation it would create a new function, with leading: true, rendering the whole throttling useless

* Add public room indicator

* Format room members count better

* Add public room test

* Add search to room summary card

* Update settings UI

* Update snapshot

* Remove default title attribute

test/components/views/spaces/__snapshots__/AddExistingToSpaceDialog-test.tsx.snap

@@ -31,7 +31,7 @@ exports[`<AddExistingToSpaceDialog /> looks as expected 1`] = `
             data-testid="avatar-img"
             data-type="square"
             style="--cpd-avatar-size: 40px;"
-            title=""
+            title="!spaceid:example.com"
           >
             <img
               alt=""
@@ -42,7 +42,6 @@ exports[`<AddExistingToSpaceDialog /> looks as expected 1`] = `
               loading="lazy"
               referrerpolicy="no-referrer"
               src="http://this.is.a.url/avatar.url/room.png"
-              title="!spaceid:example.com"
               width="40px"
             />
           </span>