Hi!
This is just a small UI improvement. We often move to the Customize tab in the inspector and do some work there. then we might scroll around a bit or previewing the change in a new tab, or something. When we click back on the Section or element, it is still in Customize tab, so we have to go up and exit it manually.
I believe that clicking on the Section/Row/Column or on the element makes a clear intent of wanting to continue editing it, since there is no other logical action while in the Customize tab. So going back to editing the element would be a logical action.
Thanks!