v17.0.7

This is the seventh preview build, with fixes and a big new feature.

• New feature: persistent effects or special rules are optional match additions that last the whole game! Change physics, terrain, and more. 5 are included in this update.
• 3 new match rules.
• 3 more emotes.
• Many touch-ups to the tiling and entities of existing levels.

Other minor bug fixes and revisions to the UI.