Permanent Option for an unstructured view in the Gallery

[anspallek]

Is your feature request related to a problem? Please describe. For a final check of the structure tree and metadata it would be helpful to be able to switch between structured and unstructured view in the Gallery. A Image can refer to several (sub-)elements and belong to different hierarchy levels.

Describe the solution you'd like Permanent option for an unstructured view in the Gallery

Describe alternatives you've considered

Additional context