Another way to achieve the original goal of this thread (moving input focus) was inadvertently pointed out in this thread. Thus:
Enable (tick) the Peek on tab feature in the MISC. section (of Settings menu -> Preferences). When your input focus is NOT in your active document (maybe it is in a console window or the Find-what zone of the Find window), but you want to move it there without changing caret position or destroying a currently-active selection(s), simply point the mouse at an inactive tab–assumes you have more than one file open–and the (IMO otherwise useless) document-peeker window will pop up. You will find input focus is now back in the editing window for the currently-active tab in the most recently-accessed view (view0 or view1).
