Selection not highlighted in Layout, Model, etc. view

Once again I find myself in Blender 2.82 limbo.

I have imported some objects from a .obj file.

In the model window I LMB on an imported object. It shows no indication it is selected in the window. The bar in the tree moves.

If I LMB on a cube I added it seems to stay selected, even though the bar in the tree has move to some other object.

If I tab, the selected object is in edit mode and I can select and modify.
(So, I guess the question why is there no indication of selection when not in edit mode?)

(I was actually pretty good with Blender several years ago…after disuse for years I just am having trouble with 2.82 UI changes :frowning_face:)