image gallery preview sort has bad option

[TanyaStere42]

Expected Behavior image gallery preview only contains valid sort options

Current Behavior col-6 on views/pages/task-images-preview.ejs

Sort by in image gallery preview appears as an option in the sort by list. resets sort to default when selected

1. go to image gallery preview
2. click sort by dropdown
3. verify that dropdown includes option “sort by”