Idea: change Projector view from admin panel

[AlexKatyukov]

Most often Projector view used by organizers at competitions in separate device. To change the round person should go to this device (if it is not in admin area), do some clicks. It is good but it will looks more professional and sometimes can be more convenient if we have one link like https://live.worldcubeassociation.org/competition/<YOUR_COMPETITION_ID>/projector. It should work in 2 modes: auto (change event when result in new event is inputed) and manual (admin can change round from admin panel).