add one more property to DigFileUploadView to allow user choice the type of upload file type, such as image/png or application/vnd.ms-excel, if it is empty, will be no limit
add one more property to DigFileUploadView to allow user choice the type of upload file type, such as image/png or application/vnd.ms-excel, if it is empty, will be no limit

jacksonic/vjlofvhjfgm,foam-framework/foam2,foam-framework/foam2,foam-framework/foam2,foam-framework/foam2,jacksonic/vjlofvhjfgm,foam-framework/foam2,jacksonic/vjlofvhjfgm