Put feature metadata columns before (to the left of) ranking columns in the DataTables

[fedarko]

Minor usability thing -- pretty sure most of the time feature metadata stuff will be more interesting to look at than ranking stuff, especially in the case when there are a lot of rankings (e.g. in the ALDEx2 example).

I think in practice this would just be a matter of switching around the argument order in this line, but we might also need to update the tests (I forget if they check for column order or not...)