change the symmetry painting feature to a list or stack of applied operations
Description of the feature
I suggest to add some kind of layers to the symmetry painting feature, adding the ability to combine them.
This could be done by a ordered list of symmetry "operators" or "layers", where the lowest layer is applied to the raw data first, then the result is fed into the second layer and so on...
Use cases
This adds a whole lot of new patterns that can be created via symmetry painting.
And i think it would adress issue #943 (closed) as well, which would then be the combination of a mandala and one or two mirror symmetries