Sim theme missing from share page after cloud compile

[jwunderl]

Describe the bug

When sharing a game with custom simulator theme in pxt.json, it appears the sim theme stops working after it gets played enough to trigger a precompilation

To Reproduce Steps to reproduce the behavior:

1. Go to https://arcade.makecode.com/S39437-76429-12376-51055
2. See sim is not themed
3. See error

Expected behavior Simulator theme is persisted even when using cloud compiled game

Screenshots

This is what the simulator should look like, screenshot from teams call of richard playing game (and me opening link afterwards showed normal unthemed simulator)