Tutorials don't offer the next level

[SimonN]

Lix 0.10.4

After you've played something in levels/single/, Lix will offer you the next level, that's correct. After you've playtested something in levels/network, Lix won't offer you next levels, that's also correct.

After you've played something in levels/tutorial/, Lix won't offer you the next tutorial either. Expected instead: Lix offers you the next tutorial.