WIP phase 39: school owners, my/others menu, guest restrictions.

src/HSchool.AppHost/AppHost.cs

@@ -17,6 +17,7 @@ if (headless)
         .WithEnvironment("Simulation__SavesDirectory", saves)
         .WithEnvironment("HSchool__AllowSaveReload", "true")
         .WithEnvironment("HSchool__AlphaPassword", "test-alpha")
+        .WithEnvironment("Simulation__MaxSchoolsTotal", "7")
         .WithEnvironment("SwarmUi__BaseUrl", "");
 }