Dimensionality Reduction plot gates will stop working if the reduction method has been changed. #299

Not sure how to solve this just yet. Currently the PCA table is regenerated each time you run reduction, and changing methods produces different features. If a user defines gates and then generates a PCA table with different features then those gates will stop working. Perhaps we can find a way to add new features to the PCA table if it already exists.

This isn't really a major issue, but for now it's a caveat worth noting.