At the moment, when closing a pane that had focus, the focus moves to the first pane that was opened (or to the most left pane. I am not sure what the logic is because in my situation both is mostly the same). This is irritating because panes are normally opened within a flow of work. When closing a pane that has focus the focus, therefor, should move to pane that had focus the last time before the now closed pane was focus. Basically, this means adhering to the chronology of focused panes.