Down arrow should move selection down after search

[Austin Riedhammer]

After searching for an application in Slingshot, pressing enter launches the first result, which is expected. If I want to launch the second result, I instinctively hit the down arrow and press enter, however this only highlights the first result and launches it again. Instead, I have to press the down arrow twice to change the selection to the second item.

I propose that when searching for an application, if I hit the down arrow once my selection is moved to the second item so that it can be launched more easily. There isn't really a need to have both enter and down arrow + enter launch the same first result.