Ensure that the NavigableGrid's current row box is updated correctly while navigating.
Initialise the NavigationBar's controls for the current grid position.
Allow user to save current row in a Grid by pressing Enter.
Fix style rules for highlighting a NEW row.
Ensure that NEW row is at least high enough for 1 row of text.
Actually respond to Enter key!
Disable Dialog test mode when tearing down tests.

Leaves the grid usable for interactive testing.
Ensure that we can modify existing rows, as well as new ones.