Clarify location and group for DropBox imports.

Includes changed wording.
Tidying as per Petr's suggestions
Merge pull request #734 from hflynn/rebased/develop/in-place-update

Improvements to import scenarios (rebased onto develop)
Merge pull request #733 from ximenesuk/dropbox-orphan-dev

Clarify location and group for DropBox imports. (rebased)