Highlight spotlight timeshift rooms with special colour

[peppy]

• Depends on Implement multiplayer categories #9491

[smoogipoo]

Fails on creating room with:

2020-07-10 10:47:39 [verbose]: ---> System.ArgumentNullException: Value cannot be null. (Parameter 'value')
2020-07-10 10:47:39 [verbose]: at System.Enum.ToObject(Type enumType, Object value)
2020-07-10 10:47:39 [verbose]: at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.EnsureType(JsonReader reader, Object value, CultureInfo culture, JsonContract contract, Type targetType)

Is this what's expected - to have a nullable value here? I'd expect to receive "normal".

[peppy]

Normal sounds better as a default, yep.