Suggestion to add warning when crystal symmetry information is missing while importing structures in xyz file format. #577
Description
When exporting an xyz file from Aiidalab, no crystal symmetry information is stored. If this file is used to import a structure back into Aiidalab, the software automatically creates a periodic structure. However, it assumes a rectilinear symmetry, which is not always true. It would be helpful if a warning was issued when no crystal symmetry information is found and the aiidalab creates this info.