Customise custom hubs

Allow users to customise their private hubs!

1. Ability to remove advertisements in custom hubs
Custom hubs include.. Main Hub, Skywars Microlobby, Bedwars Microlobby, Build Battle Microlobby and soon to be Murder Mystery Microlobby.
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Makes cinematics cleaner since there is no unwanted advertisement (EG. costume, mount, hat, backbling offerings etc)

2. Ability to place blocks in custom hubs
This will make allows the user to take cinematics more easily by placing barrier blocks so they can follow a specific path for their cinematic which may be difficult to do just by flying.
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This also allows the user to take cinematics at a sneaking or walking speed. Currently you can only take cinematics at a flying speed with a mount (If you have no controller).