v1.17.2 - Minor site updates

What's Changed

• Automatically manage predictions by @ZusorCode in #141
• Add twitch scope selector by @ZusorCode in #147

A few minor changes across the site on the front end and more behind-the-scenes changes as always.

• Added MVP/player of the match broadcast graphic
• Fixed hero recolouring not using the opacity sliders sometimes
• Minor fixes for schedule, map info, PDF embeds, logging and other things
• Updated broadcast standings to be more consistent with the website
• Implement Twitch authentication for saving credentials and the full control flow
• Add new actions to control a Twitch channel: automatic title generation, predictions creation/resolving flow
• Add a multi standings overlay to show multiple groups with customisable columns
• Add event brand designers and move them from a player relationship title

Full Changelog: v1.17.1...v1.17.2