Update delete and hide buttons

refs #6131

Originals hide button now hides the selected folder and all its children.
Arrange delete button given its own endpoint, so we don't have to guess
when a delete is for arrange instead of the filesystem.  file_browser
delete URL made configurable to support this.
Open backlog folder when populated with data

refs #6131
Update move from originals to arrange

refs #6131

If the source folder is the objects directory, add the contents of the
objects directory, not the directory itself.  Rearranged copy_to_arrange to
accomodate change and error checking.

Create sip has to be top level directory (cannot be a subfolder or the
arrange directory).
Minor fixes

refs #6131

Delete doesn't delete directories that start with the same characters.
Create directory can create top level directories if nothing is selected.