planController.moveMouse(60, 60);
// Check first wall is selected and that it moved
assertSelectionContains(home, wall1);
assertCoordinatesEqualWallPoints(20, 60, 504, 60, wall1);
// Lose focus
planController.escape();
// Check the wall didn't move at end
assertCoordinatesEqualWallPoints(20, 20, 504, 20, wall1);
// 10. Undo 8 times
for (int i = 0; i < 6; i++) {