Up/Down navigation broken

[pypeaday]

Navigating side-to-side cycles back to the far left if you go right when already on the farthest right column.

When navigating over todos you can navigate up continuously (bringing you off screen) then you can come back down ok but it should cycle down to the bottom if you go up when already on the top item -> same for going to the top from the bottom

[Waylon Walker]

Should be fixed in #5