Allow changing of Video

[camdnnn]

Currently once a video is selected for video sync and on the screen, it is no longer possible to change what the video is. For all other graphs, it will skip the video selection and move to graph selection matching the video. If you click on the create graph button on the video, what should happen is that you go to a variant of the video select screen where you can only select the videos that sync with the current set of data