[skupig]

You can use the "focus parent" bind then move off of it with your regular left/right binds.

[vladvasiliu]

Yeah, that works technically, but it's a PITA. Because you have to:

1. do an extra action

2. remember whether you actually have a parent or not, since it's context dependent. Doing this while the single-window IDE is selected, it'll do nothing (the parent is "everybody", so there's nothing to the right).