Great plugin, I can see this being a huge time saver.
Thanks for making this available.

I have noticed one small issue in my testing.
If the active theme does not already have the /patterns/ directory, when creating the very first pattern and the pattern contains an image, the image is not copied across to the newly created /patterns/images/ directory.
It then works okay when creating additional patterns, and when going back into the first pattern and editing it to replace the image (or remove and re-insert the same image).