The indexes on restored games don't get updated

[crankycyclops]

Steps to reproduce:

1. Create a game
2. Dump the game
3. Restart the server
4. Restore the game
5. Try stopping and starting the game and observe that a request for get:game:list with the is_running filter doesn't return the expected result.

I think this is because, on ordinary game creation, I assign event handlers for start and stop but don't do the same for restored games. I need to fix this and write unit tests that cover this case to make sure I don't get a regression on this in the future.