refactor: relocate diffpy.utils.wx? #358
Description
Problem
The issue comes from #347 (comment)
diffpy.utils.wx is used internally in the package, and it is now located in src/.
We want to look at where in the diffpy universe these internal used packages are being used and decide if it is better to move them elsewhere.
Proposed solution
Relocate diffpy.utils.wx to somewhere else?