It would be mighty useful if we could "group by" some value the rows in resources, packages, or dependencies lists

It would be mighty useful if we could "group by" resources, packages, dependenecies or other lists by one of the displayed attribute values such as for instance to group by extension, or by license expression or tag or something else.

I am not sure what would be the best UI treatment of this though in general I like to think of these as some sort of "facets".

- it could be a tree where the root nodes are each of the group values with a possibility to expand/toggle each group

- it could be a separate small "outline" box/ or bar on the side left or right that could be looking like the summary of the values in the same style as a Project's home "Resources detected license expressions" (but may be made a bit more compact) or a somewhat different presentation but similar data as the pie charts on the project details page.

In all cases I would like to be able to see at least one of these on demand (or one for each of all attributes and always shown?) and when I click on one of the values, I want the list to be filtered to show only these values.

We could also refine to enable multi value selection.