No option to manually rearrange the sort of data

Summary

Need sort option by letter grade ("A+", "A", A-", "B+", etc.") - critical need for universities

Content

We have a critical need to be able to drag and drop to reorder bars in graphs.

Our specific urgent use case is to correctly order by student grade for a class: Need the order to sort: A+, A, A-, B+, B, B-, etc. The only options currently available is alphabetically, rendering the only order to be A, A+, A-, B, B+, B-, etc.

In Tableau, this can be done by dragging and dropping the bars in graph to the position you want.