Add UI flow for BAM slicing

[agduncan94]

This will look similar to the by file id/name UI, however, it will only be for BAM files. The user would search for a BAM file, and then give a range of where they want to splice. The UI would then generate and display the commands needed to be run by the user to get this working.

See https://docs.gdc.cancer.gov/API/Users_Guide/BAM_Slicing/#query-parameters to see how BAM slicing regions are specified.