Clean up transient ByteStream JO fragment

A little clean up of the transient BS job options fragment:

• Add StreamBS.ExtraInputs only when needed, i.e. in the same place as adding corresponding items to StreamBS.ItemList
• Replace CLIDs with class names
• Remove commented-out code
• Make the formatting more consistent
• Fix comments to explain better what is being set up

Only the first point is a slight functionality change. The other changes are stylistic.

Please hide whitespace changes when reviewing

Closes ATR-20417, cc @wiedenma, @smh