[golf] new game from game over doesn't work

[aaylward]

initial frontend support was added in #108

remaining items:

• auto-join new game after user clicks "create new game" from game summary view
• other players in game summary view should have the option to join the new game directly from game summary once it's created
• permalinks for rooms + games

[aaylward]

backend support was added in muchq/MoonBase#862