Reorder Units, add "to top" and (maybe) "to bottom" buttons

Describe your feature request
In the “Reorder Units” tool/button, please add a button “to top”, and maybe “to bottom” for more rapid control of unit ordering.

What problem(s) would this feature solve?
When adding a new unit to organize for students, the default location of the unit is the bottom of the list. If the preferred layout has newest items at the top, it is necessary to single-step the newest unit up from the bottom. Once a class has accumulated a significant number of units, this becomes an increasingly tedious process.

Explain what you were trying to do when you came across the problem leading to this feature request
Over a semester, I may add up to 30 or so units in a course. Each new unit is added to the bottom of the list. While the list is small, it is trivial to reorder the list to put the newest units at the top. As the list gets longer, the time for my manual bubble sort increases.