New editor tabs should be added just above the console, so that the console and the new editor are easier to keep visible in the same window.

[feeley]

Come to think of it, when the stepping information "bubbles" are implemented, the console should always be the topmost box (closest to the navigation bar) and the editor boxes should be below the console. The most recently opened editor box should be just below the console. We might want to limit the size of the console to 6 lines of transcript.

Moreover, the console tab should be removed since it is not necessary, and the console buttons should be put in the navigation bar.

That way, the controls will be packed in less space.

[dufour]

Console position has been changed in 31015de7b2, but the editor controls will remain in place for now.