Merge pull request #1275 from jay-hodgson/release-65

SWC-1839: set a username for basic http auth so that credentials are req...
SWC-1837: single file upload for sftp destination for now
SWC-1837:  also pass along the upload result message, and just use the DisplayUtils.showErrorMessage which uses bootbox
in fact, remove the dialog completely and just use DisplayUtils (which uses bootbox, which means that they handle the life-cycle)
Merge pull request #1277 from jay-hodgson/SWC-1837

SWC-1837: single file upload for sftp destination for now
add username and password fields to form for sftp upload
test for credentials with different upload types
Merge pull request #1280 from jay-hodgson/SWC-1846

SWC-1846: add login form to uploader instead of relying on basic http auth
remove username