SG options after symmetry

[dagewa]

Should the symmetry step offer options after the run, like refine_bravais_settings? A CLI run of dials.symmetry produces a table of space groups versus scores (though writes out the result with the highest score). Perhaps we could have a "score only" mode of dials.symmetry that just produces this table (in a machine-readable format) and then DUI presents this table of options that the user chooses from. CC @jbeilstenedmands for thoughts on the DIALS side