This is a minor bug that has long frustrated me.
As a keyboard warrior, I tend to use the PgUp and PgDn keys to read Logos resources onscreen. But it's very frustrating that after clicking any of the panel's UI elements, keyboard focus from the panel is lost, and you have to click on the text to be able to use PgUp and PgDn again.
The worst annoyance is the 'back' button, but the links in the locator bar are also an issue. After clicking any of those, focus should do back to the resource text (as it does when you click 'back' in your web browser, for example).