Change the Page Title from just "Twitch" to "Twitch Channel Rewards" on the channel rewards popout page.

At the moment streamers using scenes with windows capture in OBS, SLOBS etc can't have multiple window sources open since the page title in the window is just a generic "twitch". It needs something unique we can match the title to so we can use it for a scene whilst streaming to show the redeemed custom rewards live on stream.