Pull request for Issue982: Remove UI Files for AMImportControllerWidget 

Moved all the ui logic from the old ui files into the cpp and h files, where they belong. Also changed some of the access logic between AMImportController and AMImportControllerWidget which were very tightly coupled. The situation for this still isn't ideal, but this isn't the current paradigm for imports. Either way AMImportController and AMImportControllerWidget might need a code review at some stage in the near future.