Dataset information should be clearly visible on the data inspection page

[daanboer]

Currently, dataset metadata is clearly displayed when searching for cross section data on the selection page. However, once the selection is made, the dataset details are missing on the inspect page. An additional table should be added that displays set-level information (name, contributor, description). Additionally, each dataset entry should provide information on the number of its processes that are in the current selection, such that it is clear whether the full set is part of the selection, or merely a subset.