Description of the new feature/enhancement

Currently moveFocus{Up,Down,Left,Right} appears to move based on how the panes were split rather than what is visibly adjacent to the current pane.

Here's a screenshot to illustrate. The red are the moveFocus{Up,Down,Left,Right} commands I'm using and the change in focus (1, 2, 3, 4), and green is how I'd expect it to work.

I've added this is a feature request rather than a bug since it may just be personal preference:

Proposed technical implementation details (optional)

Focus the first pane that first collides with the vector from the current window (top-left corner? cursor location?) in the direction of the command.