BDData `show` throws error when data is list

[pkimes]

Following error thrown when just trying to print BDData object.

> bd@data
BenchDesign Data (BDData) ----------------------------------
  type: data
  data summary:
Error: All columns in a tibble must be 1d or 2d objects:
* Column `names` is NULL
Call `rlang::last_error()` to see a backtrace

Need to fix one line to not call sapply - just need to call names directly.
https://github.com/areyesq89/SummarizedBenchmark/blob/RELEASE_3_8/R/BDData-show.R#L17

Also need to fix how dimensions/length is calculated for show of list entires.