Add ability to mirror both curves and surfaces, as well as set their dependence on the original set.
- Currently, only curves may be mirrored within style tool.
- Surfaces may have surface edits, making recreation from mirrored curves laborious.
- Recreating all patches from mirrored boundary curves can be very time consuming.
There are workflow work-arounds, but none are as quick as a "mirror [curves and surfaces] -> make [subset / complete set] independent -> modify" workflow.
