rocket destination list does not fit within screen boundaries

Testing branch as of 2021-04-20

The rocket landing pad selection menu does not entirely fit within the screen with the game in full screen mode. The last item in the list can only be selected by extremely carefully positioning the mouse below the visible line, at which point the tooltip will change and the item can be selected.

Example:

In this example 'Rocket Platform 555' is in the list, but appears off the bottom of the screen. I carefully positioned the cursor below the final item (the cursor is off the screen at this point) to mouse over the unseen item and display the tooltip. This is the only way to select it. This menuitem positioning issue occurs both on the starmap view and from the rocket control panel. There are more items below this not even selectable in this way.

This is not a problem when selecting the destination from an unlaunched rocket on another planet. In this case the rocket module menu is placed higher on the screen and doesn't hit the lower boundary.