Bug: Focus moves weirdly when pressing enter in text box

[sparr]

1. Click in the PIT text box to set custom pitch
2. Place the mouse cursor over the PIT - button
3. Type in a new pitch and press enter
4. Observe that some other button on the flight computer is highlighted as if you had moused over it, and the tooltip for that button is visible below the flight computer interface

Sometimes it takes a few tries, possibly because the random mouse target position ends up not over a button.