Hide Social Media Buttons for Certain Events

[Xevion]

Suggested by @ParkerLeathers

Certain events are not streamed/available online, so hiding the Twitch button would be great. In the future, if we have YouTube or Instagram buttons or something, it would also be good to have options to hide them.

• Do we add attributes for hiding the button, overriding it, or disabling all buttons?
• How would this feature interact with Should Event Buttons be available long after an event ends? #24?