Resolve manually when the preview element is not part of the DOM.
Resolve manually when the preview element is not part of the DOM.

Fixes #1129.

Verde1705/verde1705.github.io,blueimp/jQuery-File-Upload,blueimp/jQuery-File-Upload,blueimp/jQuery-File-Upload,Verde1705/verde1705.github.io,blueimp/jQuery-File-Upload,blueimp/jQuery-File-Upload,blueimp/jQuery-File-Upload,GrizliK1988/PhotoWidget