Update to the Broadcast page

Finally got to work on the 'Broadcast' page/tab. Been planning to make some changes for quite some time. For now I rearranged the video and chat to show two channels side by side and the chat below. Text input fields now allow you to change channel one or channel two on the go after clicking the button next to it. Still thinking of using the full screen and have some auto-re-size feature and options for selecting the amount of channels to show. For now I am happy with it. It enables watching dual streams :-)