The interactive generator now preserves the order of colours

We've received some feedback from our users and also moderators on the way how the interactive generator is working with colours. It seems like ordering them based on how they're being used in the pattern wasn't good for every use case and so we decided it would be best to always preserve the existing order. The generator now removes colours that are not actually being used in the pattern, but other than that, it doesn't touch the colours in any way.