Gallery view should properly show hierarchical structure of the document

[illipsum]

When more then one level of hierarchy is created for a document, the gallery view gets messy because it shows structure elements successively that are actually nested. Worst case is that the page order in the gallery view does not reflect the actual page order of the document which is very confusing to users of the metadata editor.

Therefore the gallery view should be enabled to reflect nesting of structure elements by nesting and indenting element "frames" just like the folders in the tree view