Add move from TS to current pipeline helper

Add helper function to move files from a transfer source location to a
path on the current pipeline. To enable this, add the location UUID to
the browse JS.
Cleanup: get_temp_dir, whitespace, JS

Remove unused get_temp_directory. Fix whitespace in copy_to_start_transfer.
Use .get instead of try/except. Return early in JS. Hide in-progress
indicator when start transfer fails.
Start Transfer: Call SS to move files

refs #7151

Replace copy_transfer_component with calls to copy_to_start_transfer to get
the SS to move files. New transfers get staged to a temp dir in
sharedDirectory/tmp, then moved to the correct watched directory.

Update Javascript in directory select to send location UUID:path.